Answer:9
Step-by-step explanation:
You would count the possible outcomes on the right side of the diagram
The number of possible outcomes is 9.
Given that,
You can travel to New York San Francisco, or Miami during June July or August.Based on the above information, the calculation is as follows:
From NewYork = 3
From San Francisco = 3
From Miami = 3
Total = 9
Therefore we can conclude that the number of possible outcomes is 9.
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A total of 517 tickets were sold for the school play. They were either adult tickets or student tickets. There were 67 more student tickets sold than adult tickets. How many adult tickets were sold?
The number of adult tickets sold for the school play was 225.
Explanation:This is a problem of simple algebra. Let's denote the number of adult tickets sold as a. It is stated in the problem that 67 more student tickets were sold than adult tickets. Therefore, we can denote the number of student tickets sold as a + 67. The problem also tells us that a total of 517 tickets were sold. Hence, we can form an equation: a + a + 67 = 517. Simplifying this equation gives us 2a + 67 = 517. And solving for a (the number of adult tickets) we subtract 67 from both sides to get 2a = 450, then divide by 2, gives us a = 225. So, 225 adult tickets were sold.
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Choose the slope-intercept equation of the line that passes through the point (-2, 4) and is parallel to y = -3x + 6.
y = 1/3 x + 14/3
y = 3x + 10
y = -3x - 2
y = - 1/3 x + 10/3
Answer:
y = -3x - 2
Step-by-step explanation:
Parallel lines have the same slope. The only answer choice with the same slope (x-coefficient = -3) as the given line is the one shown above.
A man starts walking north at 4 ft/s from a point P. Five minutes later a woman starts walking south at 5 ft/s from a point 500 ft due east of P. At what rate are the people moving apart 15 minutes after the woman starts walking
Answer:
Both are moving apart with the rate of 8.99 feet per sec.
Step-by-step explanation:
From the figure attached,
Man is walking north with the speed = 4 ft per second
[tex]\frac{dx}{dt}=4[/tex] feet per sec.
Woman starts walking due south with the speed = 5ft per second
[tex]\frac{dy}{dt}=5[/tex] ft per sec.
We have to find the rate of change in distance z.
From the right angle triangle given in the figure,
[tex]z^{2}=(x+y)^{2}+(500)^{2}[/tex]
We take the derivative of the given equation with respect to t,
[tex]2z.\frac{dz}{dt}=2(x+y)(\frac{dx}{dt}+\frac{dy}{dt})+0[/tex] -----(1)
Since distance = speed × time
Distance covered by woman in 15 minutes or 900 seconds = 5(900) = 450 ft
y = 4500 ft
As the man has taken 5 minutes more, so distance covered by man in 20 minutes or 1200 sec = 4×1200 = 4800 ft
x = 4800 ft
Since, z² = (500)² + (x + y)²
z² = (500)² + (4500 + 4800)²
z² = 250000 + 86490000
z = √86740000
z = 9313.43 ft
Now we plug in the values in the formula (1)
2(9313.43)[tex]\frac{dz}{dt}[/tex] = 2(4800 + 4500)(4 + 5)
18626.86[tex]\frac{dz}{dt}[/tex] = 18(9300)
[tex]\frac{dz}{dt}=\frac{167400}{18626.86}[/tex]
[tex]\frac{dz}{dt}=8.99[/tex] feet per sec.
Therefore, both the persons are moving apart by 8.99 feet per sec.
Final answer:
To find the rate at which the people are moving apart 15 minutes after the woman starts walking, calculate the displacements of both individuals and then find the total displacement between them. Answer comes to be 611.52 feet.
Explanation:
Rate at which people are moving apart:
The question asks at what rate are two people moving apart 15 minutes after one of them starts walking, given that one walks north and the other south from different points. To solve this, one has to understand relative velocity and the concept of adding vectors graphically.
Calculate the man's northward displacement after 15 minutes: 4 ft/s * 5 minutes = 20 ft
Calculate the woman's southward displacement after 15 minutes: 5 ft/s * 15 minutes = 75 ft
Find the total displacement between them: ([tex]\sqrt{(500^2 + 20^2)[/tex]) + [tex]\sqrt{(500^2 + 75^2))[/tex] = 611.52 ft
A rectangle is drawn on a coordinate grid. The equation for one side of the rectangle is 2x – 5y = 9. Which could be the equation of another side of the rectangle?
Answer:
[tex]25x+10y+18=0[/tex]
Step-by-step explanation:
We are given that a rectangle in which the equation of one side is given by
[tex]2x-5y=9[/tex]
We have to find the equation of another side of the rectangle.
We know that the adjacent sides of rectangle are perpendicular to each other.
Differentiate the given equation w.r.t.x
[tex]2-5\frac{dy}{dx}=0[/tex] ([tex]\frac{dx^n}{dx}=nx^{n-1}[/tex])
[tex]5\frac{dy}{dx}=2[/tex]
[tex]\frac{dy}{dx}=\frac{2}{5}[/tex]
Slope of the given side=[tex]m_1=\frac{2}{5}[/tex]
When two lines are perpendicular then
Slope of one line=[tex]-\frac{1}{Slope\;of\;another\;line}[/tex]
Slope of another side=[tex]-\frac{5}{2}[/tex]
Substitute x=0 in given equation
[tex]2(0)-5y=9[/tex]
[tex]-5y=9[/tex]
[tex]y=-\frac{9}{5}[/tex]
The equation of given side is passing through the point ([tex]0,-\frac{9}{5})[/tex].
The equation of line passing through the point [tex](x_1,y_1)[/tex] with slope m is given by
[tex]y-y_1=m(x-x_1)[/tex]
Substitute the values then we get
[tex]y+\frac{9}{5}=-\frac{5}{2}(x-0)=-\frac{5}{2}x[/tex]
[tex]y=-\frac{5}{2}x-\frac{9}{5}[/tex]
[tex]y=\frac{-25x-18}{10}[/tex]
[tex]10y=-25x-18[/tex]
[tex]25x+10y+18=0[/tex]
Hence, the equation of another side of rectangle is given by
[tex]25x+10y+18=0[/tex]
Answer:
y=2/5x-9
I just answered this and got it right.
Step-by-step explanation:
Write the equation of the linear relationship in slope-intercept form, using decimals as needed.
x 25 35 45 55
y 92.5 87.5 82.5 77.5
The equation that represents this relationship is y = ?
The equation of the linear relationship given the x and y coordinates is calculated in slope-intercept form by finding the slope and y-intercept. In this case, the equation of the line is y = -0.5x + 95.
Explanation:In mathematics, the equation of a linear relationship can be represented in the slope-intercept form, which is y = mx + c.
Where, 'm' is the slope of the line and 'c' is the y-intercept.
Given the x and y coordinates, we can calculate the slope 'm' using the formula, m = (y2 - y1) / (x2 - x1).
For example: m = (87.5-92.5) / (35-25) = -5 / 10 = -0.5. So the slope 'm' is -0.5.
Now we can find the y-intercept 'c' by substituting the known x,y coordinates and the slope into the equation and solving for 'c'. Let's take x = 25 and y = 92.5, substituting these values, we will get c = y - mx = 92.5 - (-0.5 * 25) = 95.
So, the equation of the straight line in slope-intercept form is y = -0.5x + 95.
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20% 20 % of the tickets sold at a water park were adult tickets. If the park sold 55 55 tickets in all, how many adult tickets did it sell?
A rectangular area of 36 f t2 is to be fenced off. Three sides will use fencing costing $1 per foot and the remaining side will use fencing costing $3 per foot. Find the dimensions of the rectangle of least cost. Make sure to use a careful calculus argument, including the argument that the dimensions you find do in fact result in the least cost (i.e. minimizes the cost function).
Answer:
x = 8,49 ft
y = 4,24 ft
Step-by-step explanation:
Let x be the longer side of rectangle and y the shorter
Area of rectangle = 36 ft² 36 = x* y ⇒ y =36/x
Perimeter of rectangle:
P = 2x + 2y for convinience we will write it as P = ( 2x + y ) + y
C(x,y) = 1 * ( 2x + y ) + 3* y
The cost equation as function of x is:
C(x) = 2x + 36/x + 108/x
C(x) = 2x + 144/x
Taking derivatives on both sides of the equation
C´(x) = 2 - 144/x²
C´(x) = 0 2 - 144/x² = 0 ⇒ 2x² -144 = 0 ⇒ x² = 72
x = 8,49 ft y = 36/8.49 y = 4,24 ft
How can we be sure that value will give us a minimun
We get second derivative
C´(x) = 2 - 144/x² ⇒C´´(x) = 2x (144)/ x⁴
so C´´(x) > 0
condition for a minimum
The thermostat in Steffi’s house is set to 56°F. The actual temperature variance in her house can be modeled by the inequality |t − 56|= 3. Plot the range of possible temperatures in her house.
Answer:
Step-by-step explanation:
|t − 56|= 3 states that the temperature, t, can be as low as (56-3)°F, or 53°F, and as high as (56+3)°F, or 59°F.
On a number line, plot a dark dot at both 53°F and 59°F, and then connect these two dots with a solid line.
The maximum and minimum values of temperature are 59°F and 53°F respectively.
What is inequality?A difference between two values indicates whether one is smaller, larger, or basically not similar to the other.
A mathematical phrase in which the sides are not equal is referred to as being unequal. In essence, a comparison of any two values reveals whether one is less than, larger than, or equal to the value on the opposite side of the equation.
Given the inequality
|t − 56|= 3
Now,
Taking positive value ;
t - 56 = 3
t = 59
Now taking negative value
-(t-56) = 3
t = -3 + 56 = 53
Hence "The maximum and minimum values of temperature are 59°F and 53°F respectively".
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There are three nursing positions to be filled at Lilly Hospital. Position 1 is the day nursing supervisor, position 2 is the night nursing supervisor; and position 3 is the nursing coordinator position. There are 10 candidates qualified for 3 of the positions. Determine the number of different ways that 3 positions can be filled by these applicants.a.30.b.720.c. none of these choices.d. 10.e. 120
Answer:
The correct option is B) 720.
Step-by-step explanation:
Consider the provided information.
We have 10 candidates those qualified for 3 of the positions.
There are three nursing positions to be filled at Lilly Hospital. Position 1 is the day nursing supervisor, position 2 is the night nursing supervisor; and position 3 is the nursing coordinator position.
For Position 1 we have 10 choices, if we select 1 out of 10 candidates we are left with 9 candidates.
For position 2 we have 9 candidates, if we select 1 out of 9 candidates we are left with 8 candidates.
For position 3 we have 8 candidates.
Therefore, the number of ways are: [tex]10\times 9\times 8=720[/tex]
The number of different ways that 3 positions can be filled by these applicants is 720.
Hence, the correct option is B) 720.
Correct Option Is (e. 120.) The number of different ways that 3 positions can be filled by the applicants is 120.
Explanation:To determine the number of different ways that 3 positions can be filled by these applicants, we can use the concept of combinations. Since there are 10 candidates and the order of the positions does not matter, we can use the combination formula. The number of combinations of 10 candidates taken 3 at a time is given by:
C(10, 3) = 10! / (3!(10-3)!)
Simplifying this expression, we get:
C(10, 3) = 10! / (3!7!)
Calculating the factorial values, we have:
C(10, 3) = 10 * 9 * 8 / (3 * 2 * 1) = 120
Therefore, the number of different ways that 3 positions can be filled by these applicants is 120.
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Consider an employee's whose earnings, in dollars, are according to the continuous stream f(t)=5,000e0.1t for t>0, where t is measured in years. How many years will it take them to earn a combined total of $100,000? Give your answer in years to the nearest year.
It will take approximately 10.986 years for the employee to earn a combined total of $100,000. Rounding to the nearest year, it will take approximately 11 years for the employee to reach this earnings milestone.
To determine how many years it will take for the employee to earn a combined total of $100,000, we need to set up and solve the following integral:
[tex]\[ \int_{0}^{t} 5000e^{0.1\tau} \, d\tau = 100,000 \][/tex]
Here, [tex]\( t \)[/tex] represents the time in years. The integral represents the accumulated earnings from the start (0 years) to t years based on the continuous stream function[tex]\( f(\tau) = 5000e^{0.1\tau} \).[/tex]
Let's solve this integral:
[tex]\[ \int_{0}^{t} 5000e^{0.1\tau} \, d\tau = \left. \frac{5000}{0.1}e^{0.1\tau} \right|_{0}^{t} \][/tex]
Evaluate this at the upper and lower limits:
[tex]\[ \frac{5000}{0.1}e^{0.1t} - \frac{5000}{0.1}e^{0.1 \times 0} \][/tex]
Simplify:
[tex]\[ 50000(e^{0.1t} - 1) \][/tex]
Now, set this expression equal to the target earnings of $100,000 and solve for t :
[tex]\[ 50000(e^{0.1t} - 1) = 100,000 \][/tex]
Divide both sides by 50000:
[tex]\[ e^{0.1t} - 1 = 2 \][/tex]
Add 1 to both sides:
[tex]\[ e^{0.1t} = 3 \][/tex]
Now, take the natural logarithm (ln) of both sides:
[tex]\[ 0.1t = \ln(3) \][/tex]
Solve for t:
[tex]\[ t = \frac{\ln(3)}{0.1} \][/tex]
Using a calculator:
[tex]\[ t \approx \frac{1.0986}{0.1} \]\[ t \approx 10.986 \][/tex]
2. Which coordinate divides the directed line segment from –10 at J to 23 at K in the ratio of 2 to 1? Explain.
A. 1
2. 11
C. 12
Answer:
12
Step-by-step explanation:
x=(-10×1+23×2)÷(2+1)=36/3=12
Final answer:
The coordinate that divides the line segment from -10 at J to 23 at K in the ratio of 2 to 1 is C) 12.
Explanation:
The coordinate that divides the line segment from -10 at J to 23 at K in the ratio of 2 to 1 is 12.
To find this coordinate, we can use the concept of a section formula. Let the ratio be m:n. The coordinate divided is [tex](\frac{mx_2 + nx_1}{m+n}, \frac{my_2 + ny_1}{m+n})[/tex]. Substituting the values, we get [tex](\frac{2 ( 23) + 1 ( -10)}{2+1}, \frac{2 (0) + 1 ( 2)}{2+1})[/tex] = (12, 0).
Therefore, the required coordinate that divides the line segment in the ratio of 2 to 1 is C) 12.
Harry has a small business cleaning kitchens and bathrooms. He usually cleans a bathroom in 1 hour and cleans a kitchen in 45 minutes. He never works more than 15 hours in a week. Harry earns $60 per bathroom and $20 per kitchen job. He does not do more than 8 bathroom jobs per week (the smell gets to him). Find a combination of bathroom and kitchen jobs per week that will maximize his income and state the amount.
Answer:
8 bathroom jobs and 9 kitchen jobs
Step-by-step explanation:
B=60
K=20
8*60=480
9*20=180
that would give harry 660 dollars in a week. HOWEVER- we have to make sure that its equal to or less than 15 hours of work.
8*1h= 8 hours in bathroom
9*45m=6.75hr in kitchen
8 hours+6.75 hours=14.75hr 14.75 hr<15hr so it works.
Giovanni orders a pastry from the bakery. The price of the pastry before tax is $4.50. Giovanni wants to know the total price including a 10% sales tax.
Answer:
4.95
Step-by-step explanation:
You take the 4.50 and multiply it by 1.10 and it equals 4.95. Also I did it and I got it right.
The total price of the pastry is $4.95.
Given to usprice of the pastry = $4.50
sales tax = 10%
Sales taxThe sales tax on the pastry is 10% of the price of the pastry.
Tax on pastry = price of the pastry x percentage of sales tax
[tex]= \$4.50 \times 10\%\\= 4.5\times \dfrac{10}{100}\\= 4.50 \times 0.1\\= 0.45[/tex]
therefore, the tax on the pastry will be $0.45
Total price of the pastryTotal price of the pastry = Price of the pastry + tax on the pastry
= $4.50 + $0.45
= $4.95
Hence, the total price of the pastry is $4.95.
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At a recent track meet the fastest time in the 40-yard dash was 4.37 seconds on the slowest time was 5.08 seconds what is the difference between the fastest and slowest time
The difference between the fastest and slowest time in the 40-yard dash is 0.71 seconds.
Explanation:The difference between the fastest and slowest time in the 40-yard dash can be found by subtracting the slowest time from the fastest time. In this case, the fastest time was 4.37 seconds and the slowest time was 5.08 seconds. To find the difference, we subtract 5.08 seconds from 4.37 seconds.
The difference between the fastest and slowest time is 0.71 seconds.
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What value of x will make parallelogram ABCD a rhombus?
Answer:
x = 34
Step-by-step explanation:
The figure will be a rhombus if the diagonals cross at right angles. That is ...
(3x -12)° = 90°
3x = 102
x = 34
The figure is a rhombus when x=34.
The value of x will make parallelogram ABCD a rhombus when all sides are of equal length, which corresponds to the situation where the diagonals have slopes of +1 and -1 and bisect each other at right angles.
Explanation:To determine the value of x that will make parallelogram ABCD a rhombus, we can consider the geometric properties that define a rhombus. A rhombus is a type of parallelogram with all sides of equal length, which also means its diagonals bisect each other at right angles. Given that the diagonals of the parallelogram must have slopes of +1 and -1 to maintain the properties of bisection, x would be the length making the sides of the parallelogram equilateral.
In the scenario where the original shape is a unit square, changes in frame of reference should preserve the affine property of bisection. Hence, parallelogram ABCD will become a rhombus when all sides are of equal length, which can be determined through equilateral properties of the parallelogram when the diagonals bisect each other at right angles and have slopes of +1 and -1.
Amaya has a store credit of 50.86 she plans to purchase a video game for $24.97 and a golf club accessory for $6.99 how much store credit will she have left
Amaya will have $18.90 store credit left.
Step-by-step explanation:
Available store credit = $50.86
Cost of video game = $24.97
Cost of golf club accessory = $6.99
Total amount spent = Cost of video game + cost of golf club accessory
[tex]Total\ amount\ spent=24.97+6.99\\Total\ amount\ spent=\$31.96[/tex]
Remaining store credit = Available store credit - total amount spent
[tex]Remaining\ store\ credit=50.86-31.96\\Remaining\ store\ credit=\$18.90[/tex]
Amaya will have $18.90 store credit left.
Keywords: Addition, subtraction
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Use Descartes' Rule of Signs to determine the possible numbers of positive and negative real zeros of f (x )equals x cubed plus 5 x squared plus 7 x plus 6f(x)=x3+5x2+7x+6. What are the possible numbers of positive real zeros?
Answer:
0
Step-by-step explanation:
All of the terms have positive signs, so there are no sign changes. Zero sign changes means there are zero positive real roots.
A sumo wrestling ring is circular and has a circumference of 4.6\pi \text{ meters}4.6π meters4, point, 6, pi, start text, space, m, e, t, e, r, s, end text. What is the area AAA of the sumo wrestling ring in square meters? Give your answer in terms of \piπpi. A=A=A, equals \text{m}^2m 2
Answer:
The area of the sumo wrestling ring is [tex]5.29 \pi[/tex]
Step-by-step explanation:
The circumference of the circular sumo wrestling ring is [tex]4.6\pi[/tex], that means its radius [tex]r[/tex] is:
[tex]2\pi r=4.6\pi[/tex]
[tex]r=\frac{4.6}{2} =\boxed{2.3\:meters.}[/tex]
Now once we have the radius [tex]r[/tex] of the sumo wrestling ring we can find its area [tex]A[/tex] by the following formula:
[tex]A=\pi r^2[/tex]
Putting in the value of [tex]r=2.3\:meters[/tex] we get:
[tex]A=\pi (2.3m)^2=\boxed{5.29\pi\:\:m^2}[/tex]
Therefore the area of the sumo wrestling ring is [tex]{5.29\pi\:\:m^2[/tex]
Answer:
5.29pi
Step-by-step explanation:
A random number generator is used to create a list of 300 single-digit numbers. Of those 300 numbers, 146 are odd and 154 are even. The number 8 was generated 22 times. What is the experimental probability of an even number other than 8 being generated
Answer:
0.44
Step-by-step explanation:
The total numbers drawn = 300
Out those 146 are odd and 154 are even.
The number 8 was drawn = 22 times
So, the number of times an even number other than 8 = 154 -22 = 132
The experimental probability = The number of favorable outcomes ÷ The number of possible outcomes.
The experimental probability of an even number other than 8 being generated = [tex]\frac{132}{300}[/tex]
Simplify the above fraction to decimal, we get
= 0.44
Therefore, the answer is 0.44
Consider the given function and the given interval.
f(x) = 3 sqrt x, [0, 16]
(a) Find the average value fave of f on the given interval
(b) Find c such that fave = f
(c). (Round your answer to three decimal places.)
Answer:
(a) fave = 8
(b) c = 64/9
(c) c ≈ 7.111
Step-by-step explanation:
(a) The average value of the function is its integral over the interval, divided by the width of the interval.
[tex]f_{ave}=\displaystyle\frac{1}{16-0}\int_0^{16} {3x^{\frac{1}{2}}} \, dx=\left.\frac{x^{3/2}}{8}\right|_0^{16}=8[/tex]
__
(b) We want ...
f(c) = 8
3√c = 8 . . . . . use f(c)
√c = 8/3 . . . . . divide by 3
c = (8/3)² . . . . square
c = 64/9
__
(c) c ≈ 7.111
To find the average value of a function, evaluate the definite integral over the interval and divide by the length of the interval.
Explanation:To find the average value of a function on a given interval, we need to evaluate the definite integral of the function over the interval and divide it by the length of the interval.
For the given function f(x) = 3√x on the interval [0, 16], the average value fave is given by:
fave = (1/[16-0]) * ∫(0 to 16) 3√x dx
Simplifying this integral, we get:
fave = 3/16 * (2/3) * (16^(3/2) - 0^(3/2)) = 4(16 - 0) = 64
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Coach A is offering her services for an initial $6,925 in addition to $450 per hour. Coach B is offering her services for an initial $5,000 in addition to $725 per hour. When will the two coaches charge the same amount of money? The two coaches will charge the same amount of money after
Answer:
The two coaches will charge the same amount of money after working for 11 hours
Step-by-step explanation:
Let us assume for m hours, they both will charge same amount.
For COACH A:
The initial Fee = $ 6,925
The per hour fee = $450
So, the fees in m hours = m x ( Per hour fees) = m x ($450) = 450 m
So, the total fees of Coach A in m hours = Initial Fee + fee for m hours
= $ 6,925 + 450 m
⇒ The total fees of Coach A in m hours = $ 6,925 + 450 m .... (1)
For COACH B:
The initial Fee = $ 5,000
The per hour fee = $725
So, the fees in m hours = m x ( Per hour fees) = m x ($725) = 725 m
So, the total fees of Coach B in m hours = Initial Fee + fee for m hours
= $ 5,000 + 725 m
⇒ The total fees of Coach B in m hours =$ 5,000 + 725 m .... (2)
Now, for m hours , they both charge the SAME AMOUNT fees
⇒$ 6,925 + 450 m = $ 5,000 + 725 m ( from (1) and (2))
or, 6925 - 5000 = 725 m - 450 m
or, 1925 = 175 m
or,m = 1925 / 175 = 11
or, m = 11
Hence, the two coaches will charge the same amount of money after working for 11 hours.
Find the cotangent, cosine, and tangent of both angles A and B.
If you could put it in this format:
Cotangent -
Cosine -
Tangent -
that would be epic :^D
Answer:
[tex]\displaystyle \frac{5}{12} = cot∠B \\ 2\frac{2}{5} = cot∠A \\ \\ 2\frac{2}{5} = tan∠B \\ \frac{5}{12} = tan∠A \\ \\ \frac{5}{13} = cos∠B \\ \frac{12}{13} = cos∠A[/tex]
Step-by-step explanation:
[tex]\displaystyle \frac{OPPOSITE}{HYPOTENUSE} = sin\:θ \\ \frac{ADJACENT}{HYPOTENUSE} = cos\:θ \\ \frac{OPPOSITE}{ADJACENT} = tan\:θ \\ \frac{HYPOTENUSE}{ADJACENT} = sec\:θ \\ \frac{HYPOTENUSE}{OPPOSITE} = csc\:θ \\ \frac{ADJACENT}{OPPOSITE} = cot\:θ \\ \\ \frac{10}{24} = cot∠B → \frac{5}{12} = cot∠B \\ \frac{24}{10} = cot∠A → 2\frac{2}{5} = cot∠A \\ \\ \frac{24}{10} = tan∠B → 2\frac{2}{5} = tan∠B \\ \frac{10}{24} = tan∠A → \frac{5}{12} = tan∠A \\ \\ \frac{10}{26} = cos∠B → \frac{5}{13} = cos∠B \\ \frac{24}{26} = cos∠A → \frac{12}{13} = cos∠A[/tex]
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Use the confidence interval to find the estimated margin of error. Then find the sample mean.
A biologist reports a confidence interval of (3.8,4.8 )when estimating the mean height (in centimeters) of a sample of seedlings.
Answer: The estimated margin of error = 0.5 centimeter
The sample mean = 4.3 centimeters
Step-by-step explanation:
The confidence interval for population mean is given by :-
[tex]\overline{x}\pm E[/tex]
or [tex](\overline{x}-E,\ \overline{x}+E)[/tex]
, where [tex]\overline{x}[/tex] = sample mean.
E = Margin of error .
The given confidence interval : (3.8,4.8 )
Lower limit : [tex]\overline{x}-E=3.8[/tex] (1)
Upper limit = [tex]\overline{x}+E=4.8[/tex] (2)
Eliminate equation (1) from (2) , we get
[tex]2E=1.0\\\\\Rightarrow\ E=\dfrac{1}{2}=0.5[/tex]
⇒ The estimated margin of error = 0.5 centimeter
Add (1) and (2) ,we get
[tex]2\overline{x}-E=8.6\\\\\Rightarrow\ \overline{x}=\dfrac{8.6}{2}=4.3[/tex]
⇒ The sample mean = 4.3 centimeters
Which is the best interpretation of the solution set for the compound inequality?
3(2x + 1) > 21 or 4x + 3 < 3x +7
no solution
3
Ox<3 or x > 4
all real numbers
For this case we must find the solution set of the given inequalities:
Inequality 1:
[tex]3 (2x + 1)> 21[/tex]
Applying distributive property on the left side of inequality:
[tex]6x + 3> 21[/tex]
Subtracting 3 from both sides of the inequality:
[tex]6x> 21-3\\6x> 18[/tex]
Dividing by 6 on both sides of the inequality:
[tex]x> \frac {18} {6}\\x> 3[/tex]
Thus, the solution is given by all the values of "x" greater than 3.
Inequality 2:
[tex]4x + 3 <3x + 7[/tex]
Subtracting 3x from both sides of the inequality:
[tex]4x-3x + 3 <7\\x + 3 <7[/tex]
Subtracting 3 from both sides of the inequality:
[tex]x <7-3\\x <4[/tex]
Thus, the solution is given by all values of x less than 4.
The solution set is given by the union of the two solutions, that is, all real numbers.
Answer:
All real numbers
What is the area of the rectangle
Answers
60 units
66 units
70 units
74 units
Answer:
The answer to your question is 74 u²
Step-by-step explanation:
Process
1.- Find the 4 vertices
A (-2, 8)
B (0, -4)
C (4, 9)
D (6, -3)
2.- Find the length of the base and the height
[tex]d = \sqrt{(x2 - x1)^{2} + (y2 - y1)^{2} }[/tex]
Distance AB = \sqrt{(0 + 2)^{2} + (-4 - 8)^{2} }[/tex]
dAB = [tex]\sqrt{4 + 144}[/tex]
dAB = [tex]\sqrt{148}[/tex]
Distance BD = \sqrt{(6 - 0)^{2} + (-3 + 4)^{2} }[/tex]
dBD = [tex]\sqrt{36 + 1}[/tex]
dBD = [tex]\sqrt{37}[/tex]
3.- Find the area
Area = base x height
Area = [tex]\sqrt{148} x \sqrt{37}[/tex]
Area = [tex]\sqrt{5476}[/tex]
Area = 74 u²
Use Stokes' Theorem to evaluate S curl F · dS. F(x, y, z) = x2z2i + y2z2j + xyzk, S is the part of the paraboloid z = x2 + y2 that lies inside the cylinder x2 + y2 = 16, oriented upward.
Answer:
[tex]\displaystyle \iint_S {\text{curl \bold{F}} \cdot} \, dS = \boxed{\bold{0}}[/tex]
General Formulas and Concepts:
Calculus
Integration Rule [Reverse Power Rule]:
[tex]\displaystyle \int {x^n} \, dx = \frac{x^{n + 1}}{n + 1} + C[/tex]
Integration Rule [Fundamental Theorem of Calculus 1]:
[tex]\displaystyle \int\limits^b_a {f(x)} \, dx = F(b) - F(a)[/tex]
Integration Property [Multiplied Constant]:
[tex]\displaystyle \int {cf(x)} \, dx = c \int {f(x)} \, dx[/tex]
Integration Property [Addition/Subtraction]:
[tex]\displaystyle \int {[f(x) \pm g(x)]} \, dx = \int {f(x)} \, dx \pm \int {g(x)} \, dx[/tex]
Integration Methods: U-Substitution + U-Solve
Multivariable Calculus
Partial Derivatives
Triple Integrals
Cylindrical Coordinate Conversions:
[tex]\displaystyle x = r \cos \theta[/tex][tex]\displaystyle y = r \sin \theta[/tex][tex]\displaystyle z = z[/tex][tex]\displaystyle r^2 = x^2 + y^2[/tex][tex]\displaystyle \tan \theta = \frac{y}{x}[/tex]Integral Conversion [Cylindrical Coordinates]:
[tex]\displaystyle \iiint_T {f(r, \theta, z)} \, dV = \iiint_T {f(r, \theta, z)r} \, dz \, dr \, d\theta[/tex]
Vector Calculus
Surface Area Differential:
[tex]\displaystyle dS = \textbf{n} \cdot d\sigma[/tex]
Del (Operator):
[tex]\displaystyle \nabla = \hat{\i} \frac{\partial}{\partial x} + \hat{\j} \frac{\partial}{\partial y} + \hat{\text{k}} \frac{\partial}{\partial z}[/tex]
[tex]\displaystyle \text{div \bf{F}} = \nabla \cdot \textbf{F}[/tex][tex]\displaystyle \text{curl \bf{F}} = \nabla \times \textbf{F}[/tex]Stokes’ Theorem:
[tex]\displaystyle \oint_C {\textbf{F} \cdot } \, d\textbf{r} = \iint_S {\big( \nabla \times \textbf{F} \big) \cdot \textbf{n}} \, d\sigma[/tex]
Divergence Theorem:
[tex]\displaystyle \iint_S {\big( \nabla \times \textbf{F} \big) \cdot \textbf{n}} \, d\sigma = \iiint_D {\nabla \cdot \textbf{F}} \, dV[/tex]
Step-by-step explanation:
Step 1: Define
Identify given.
[tex]\displaystyle \textbf{F} (x, y, z) = x^2z^2 \hat{\i} + y^2z^2 \hat{\j} + xyz \hat{\text{k}}[/tex]
[tex]\displaystyle \text{Region:} \left \{ {{\text{Paraboloid:} \ z = x^2 + y^2} \atop {\text{Cylinder:} \ x^2 + y^2 = 16}} \right[/tex]
Step 2: Integrate Pt. 1
Find div F:Step 3: Integrate Pt. 2
Convert region from rectangular coordinates to cylindrical coordinates.
[tex]\displaystyle \text{Region:} \left \{ {{\text{Paraboloid:} \ z = x^2 + y^2} \atop {\text{Cylinder:} \ x^2 + y^2 = 16}} \right \rightarrow \left \{ {{\text{Paraboloid:} \ z = r^2} \atop {\text{Cylinder:} \ r^2 = 16}} \right[/tex]
Identifying limits, we have the bounds:
[tex]\displaystyle \left\{ \begin{array}{ccc} 0 \leq z \leq r^2 \\ 0 \leq r \leq 4 \\ 0 \leq \theta \leq 2 \pi \end{array}[/tex]
Step 4: Integrate Pt. 3
[Integral] Substitute in variables and region:We evaluate the Stokes' Divergence Theorem Integral using basic integration techniques listed under "Calculus".
[tex]\displaystyle \begin{aligned}\iint_S {\text{curl } \textbf{F} \cdot} \, dS & = \int\limits^{2 \pi}_0 \int\limits^4_0 \int\limits^{r^2}_0 {r \bigg( 2z^2r \cos \theta + 2z^2r \sin \theta +r^2 \cos \theta \sin \theta \bigg)} \, dz \, dr \, d\theta \\& = \frac{1}{3} \int\limits^{2 \pi}_0 \int\limits^4_0 {zr^2 \bigg[ 2z^2 \big( \cos \theta + \sin \theta \big) + 3r \sin \theta \cos \theta \bigg] \bigg| \limits^{z = r^2}_{z = 0}} \, dr \, d\theta \\\end{aligned}[/tex]
[tex]\displaystyle \begin{aligned}\iint_S {\text{curl } \textbf{F} \cdot} \, dS & = \frac{1}{3} \int\limits^{2 \pi}_0 \int\limits^4_0 {r^5 \bigg[ 2r^3 \big( \cos \theta + \sin \theta \big) + 3 \sin \theta \cos \theta \bigg]} \, dr \, d\theta \\& = \frac{1}{54} \int\limits^{2 \pi}_0 {r^6 \bigg[ 4r^3 \big( \cos \theta + \sin \theta \big) + 9 \sin \theta \cos \theta \bigg] \bigg| \limits^{r = 4}_{r = 0}} \, d\theta \\\end{aligned}[/tex]
[tex]\displaystyle \begin{aligned}\iint_S {\text{curl } \textbf{F} \cdot} \, dS & = \frac{2048}{27} \int\limits^{2 \pi}_0 {\cos \theta \Big( 9 \sin \theta + 256 \Big) + 256 \sin \theta} \, d\theta \\& = \frac{-1024}{243} \bigg[ 4608 \cos \theta - \bigg( 9 \sin \theta + 256 \bigg)^2 \bigg] \bigg| \limits^{\theta = 2 \pi}_{\theta = 0} \\& = \boxed{\bold{0}}\end{aligned}[/tex]
∴ we have calculated the Stokes' Theorem integral with the given region and function using the Divergence Theorem.
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Topic: Multivariable Calculus
The Stokes' theorem is applied to convert a surface integral of a curl of a vector into a line integral. This is done by identifying the curl of the given vector field F and setting up the limits of the integral based on given bounds. The integral is then evaluated.
Explanation:Stokes' theorem is used in vector calculus to simplify certain types of surface integrals. It transforms a surface integral of a curl of a vector field into a line integral. F(x, y, z) = x2z2i + y2z2j + xyzk, here, is the given vector field. The surface S is the part of the paraboloid that lies within the cylinder x² + y² = 16. The theorem is used to evaluate the integral S curl F · dS, by treating the surface integral as a line integral. The line integral can be easier to evaluate. The exact process involves identifying the curl of F, setting up the bounds of the integral based on the restrictions given, and then computing the integral.
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Long-term studies of Belding's ground squirrels show that immigrants move nearly 2 km from where they are born and make up 1 to 8% of the males and 0.7 to 6% of the females in other populations. On an evolutionary scale, why is this significant?
Answer:
It is significant because when they migrate from one place to other it becomes a source of genetic diversity between them and other population.
Step-by-step explanation:
If you wanted to view data in reports by different user categories such as Bronze, Gold, and Platinum status levels, what Google Analytics feature would you set up to collect this data?
A. Customer Filter
B. Customer Dimension
C. Custom Metric
D. Event Tracking
Answer:
B. Customer Dimension
Step-by-step explanation:
Custom dimensions is used to collect and analyze data that Analytics doesn't capture. You can send value to custom dimensions with a variable that pulls data from web page or use layer to pass specific values.
If you want to view data by different user such as Bronze , Gold , Platinum level Google Analytics feature set up the Custom Dimensions to collect the data.
The G. Analytics feature I would set up to collect this data is B. Customer Dimension
What is the customer dimension?Custom dimensions are used to gather and examine information that Analytics is unable to. A variable that retrieves information from a web page can be used to deliver value to custom dimensions, or a layer can be used to provide certain values. Sales data is broken down into individual customers via the customer hierarchy in the customer dimension.
To comply with reporting standards, the hierarchy between the root element All Customers and the individual customer might be arranged arbitrarily.
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The office building is 48 floors high. Half of the floors have 18 windows each and half of the floors have 36 windows each. How many windows does the building have in all?
Answer:
1296 windows
Step-by-step explanation:
HALF of the floors, means
HALF of 48, that is:
48 * 0.5 = 24
Thus, we can say:
24 floors each have 18 windows, and
24 floors each have 36 windows
Total Number of Windows:
24 * 18 = 432 windows
24 * 36 = 864 windows
Total = 432 + 864 = 1296 windows
Answer:
1296 windows are present in the building
Explanation:
Given the office building is 48 floors high
Half of floors have 18 windows each
Then , half of floors =[tex]\frac{48}{2}[/tex] = 24 floors
Total windows on half of the floors, that is 24 floors
= [tex]18\times 24[/tex]
= 432 windows
Also, half of the floors have 36 windows each
Total windows on rest half floors (24 floors)
=[tex]36 \times 24[/tex]
= 864 windows
Total windows = 432 + 864 = 1296 windows
Therefore, 1296 windows are present in the building
A mixture of 5 pounds of fertilizer A, 13 pounds of fertilizer B, and 4 pounds of fertilizer C provides the optimal nutrients for a plant. Commercial brand X contains equal parts of fertilizer B and fertilizer C. Commercial brand Y contains one part of fertilizer A and two parts of fertilizer B. Commercial brand Z contains two parts of fertilizer A, five parts of fertilizer B, and two parts of fertilizer C. How much of each fertilizer brand is needed to obtain the desired mixture?
The optimal mixture to compose the desired fertilizer can be obtained using 17 lbs of Brand X, 6 lbs of Brand Y, and 8 lbs of Brand Z.
Explanation:To solve this problem, let us denote X as the amount of brand X, Y as the amount of brand Y, and Z as the amount of brand Z. Since brand X contains equal parts of fertilizers B and C, and the optimal nutrients contain 13 lbs of B and 4 lbs of C, we can say that X = 13 lbs + 4 lbs = 17 lbs.
Brand Y contains one part of A and two parts of B. As we know from the problem that we need 5 lbs of A and 13 lbs of B, we get the equation Y = 5/3 lbs + 13/3 lbs = 6 lbs of Y. This equation is derived from the fact that for every 3 lbs of Y, you get 1.lb of A and 2 lbs of B.
Lastly, brand Z contains two parts of A, five parts of B, and four parts of C. So, Z could be calculated by the combined remainder of A, B and C i.e. (5 - 5/3 lbs) of A, (13 - 13 lbs) of B, and (4 - 4 lbs) of C which will get you approximately 8 lbs of brand Z.
So, you would need roughly 17 lbs of brand X, 6 lbs of brand Y, and 8 lbs of brand Z to create the desired fertilizer mixture.
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