we know that
A unit rate is a ratio between two different units with a denominator of one
In this problem to find the unit rate divide the total distance by the total time
so
[tex]\frac{822.6}{18} \frac{Km}{hours}= 45.7\frac{Km}{hour}[/tex]
therefore
the answer is
The unit rate is equal to [tex] 45.7\frac{Km}{hour}[/tex]
Twice the difference between a number and 10 is equal to 6 times the number plus 16. What is the number?
Three quarters of the batch of twenty cookies burned when you forgot to take them out of the oven how many cookies burned
A spherical block of ice melts so that its surface area decreases at a constant rate: ds/dt = - 8 pi cm^2/s. calculate how fast the radius is decreasing when the radius is 3cm. (recall that s = 4 pi r^2.)
Find the second of two consecutive integers if the second is 13 less than twice the first.
Recycling Center A processes aluminum at a rate of 100 pounds per hour, while Recycling Center B processes aluminum at a rate of 2 tons per week. Assuming that both centers operate all day every day, which center processes aluminum faster, and why?
A:Recycling Center A processes aluminum faster; Recycling Center B’s rate is about 12 pounds per hour.
B:Recycling Center A processes aluminum faster; Recycling Center B’s rate is about 24 pounds per hour.
C:Recycling Center B processes aluminum faster; its rate is about 120 pounds per hour.
D:Recycling Center B processes aluminum faster; its rate is about 240 pounds per hour.
Evaluate the upper and lower sums for f(x) = 1 + x2, −1 ≤ x ≤ 1, with n = 3 and 4.
Answer:
92/27 and 58/27 for n=3 and 13/4 and 9/4 for n=4
Step-by-step explanation:
n = 3: First let’s find ∆x:
∆x = (b − a)/n = 1 − (−1)3 = 2/3
We will have three intervals: −1 ≤ x ≤ −1/3, −1/3 ≤ x ≤1/3, 1/3 ≤ x ≤ 1.
Upper sum: On the first interval, the highest point occurs at f(−1) = 2. On the second interval, the highest point occurs at f(1/3) = f(−1/3) = 1 + ( 1/3)^2=1 + 1/9 = 10/9
On the third interval, the highest point occurs at f(1) = 2. So A ≈ A upper = 3Σ i=1 f(xi)∆x = [f(−1) + f (1/3)+ f(1)]∆x = (2 +10/9+ 2)*2/3 = 92/27
Lower sum: On the first interval, the lowest point occurs at f(−1/3) = 10/9
On the second interval, the lowest point occurs at f(0) = 1. On the third interval, the lowest point occurs at f(1/3) = 10/9. SoA ≈ A lower =3Σ i=1 f(xi)∆x = f(−1/3) + f(0) + f(1/3) . ∆x = (10/9+ 1 +10/9)· 2/3= 58/27
Apply the same technique for n=4
Under good weather conditions, 80% of flights arrive on time. during bad weather, only 30% of flights arrive on time. tomorrow, the chance of good weather is 60%. what is the probability that your flight will arrive on time?
The probability that your flight will arrive on time is 0.6, or 60%.
Explanation:To calculate the probability that your flight will arrive on time, we can use the concept of conditional probability. Let A represent the event of good weather and B represent the event of the flight arriving on time. We know P(A) = 0.6, P(B|A) = 0.8, and P(B|A') = 0.3 (where A' represents bad weather). We can use the formula for conditional probability: P(B) = P(A) * P(B|A) + P(A') * P(B|A'). Substituting the given values, we have P(B) = 0.6 * 0.8 + 0.4 * 0.3 = 0.48 + 0.12 = 0.6. Therefore, the probability that your flight will arrive on time is 0.6, or 60%.
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You buy the same number of brushes, rollers, and paint cans. Write and expression in simplest form that represents the toral amount of money you spend for the painting supplies
Arleen has a gift card for a local lawn and garden store. She uses the gift card to rent a tiller for 4 days. It cost $35 per day to rent the tiller. She also buys a rake for $9.
A. Find the change to the value on the gift card. (Question #1)
B. The original amount on the gift card was $200. Does Arleen have enough to buy a Wheelbarrow for $50? (Question #2)
Answer:
Step-by-step explanation:
Arleen has a gift card of the amount = $200
The total cost to rent the tiller for 4 days and a rake for $9
= ($35 × 4) + $9
= 140 + 9 = $149
A. Now the balance on the gift card = $200 - $149
= $51
B. Arleen have $51 in her gift card so she has enough to buy a wheelbarrow for $50.00.
Josh is twenty-five years older than his son Carlos. In ten years Josh will be twice as old as Carlos. How old is Carlos now?
Evaluate the line integral ∫cf⋅dr∫cf⋅dr, where f(x,y,z)=−5xi+yj+zkf(x,y,z)=−5xi+yj+zk and c is given by the vector function r(t)=⟨sint,cost,t⟩, 0≤t≤3π/2.
A bouncing ball reaches a height of 27 feet at its first peak, 18 feet at its second peak, and 12 feet at its third peak. Describe how a sequence can be used to determine the height of the ball when it reaches its fourth peak.
Answer:
so on the fourth bounce the ball will reach a height of 8 feet
Step-by-step explanation:
There is a common ratio of 2/3 between the height of the ball at each bounce so the bounce height from a geometric sequence 27,18,12 two-thirds of 12 is 8 so on the fourth bounce the ball will reach a height of 8 feet
Jay is cutting a roll of biscuit dough into slices that are 3/8 inch thick. If the roll is 10 1/2 inches long, how many slices
can he cut?
The number of slices that Jay could make is equal to 28
What is a mixed fraction?A fraction represented with its quotient and remainder is a mixed fraction. For example, 2 1/3 is a mixed fraction, where 2 is the quotient, and 1 is the remainder. So, a mixed fraction is a combination of a whole number and a proper fraction.
Given here: Dimension of the roll= 10¹/₂ inches and length of each slice=3/8 inch
Thus the number of slices that Jay could make is = 10+ 1/2 /3/8
=21/2 × 8/3
=28
Hence The number of slices that Jay could make is equal to 28
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Myra borrowed $1,500 at 12.5% interest for three months. How much
does she have to repay under a single-payment plan?
a. $46.88
b. $1,562.50
c. $1,546.88
d. $187.50
**please explain how you got the answer, it's just so that I can understand
It takes 40 min for a bus to travel the 36 miles from Framingham to Worcester. A car traveling from Worcester to Framingham moves 1.5 times as fast as the bus. If the car and the bus start moving towards each other simultaneously, after how many minutes will they meet?
The velocity of the bus is:
velocity (bus) = 36 miles / 40 min
velocity (bus) = 0.9 miles / min
Since the car is 1.5 times faster, so the velocity of the car is:
velocity (car) = 1.5 * 0.9 miles / min
velocity (car) = 1.35 miles / min
At the meeting point, the sum of the distance is equal to 36 miles. Therefore:
1.35 t + 0.9 t = 36
2.25 t = 36
t = 16 min
So they will meet after 16 minutes.
one pumpkin vine produce 5pumpkins I harvest 30 how many vines do I have
At the city museum, child admission is $5.80 and adult admission is $9.00 . On Monday, three times as many adult tickets as child tickets were sold, for a total sales of $984.00 . How many child tickets were sold that day?
Answer:
30
Step-by-step explanation:
A bundle of 3 adult tickets and 1 child ticket sells for $32.80, so there were ...
... $984/$32.80 = 30 . . . . bundles sold.
The number of child tickets sold was 30.
_____
Using an equation
Let c represent the number of child tickets sold. Then 3c is the number of adult tickets sold. The total revenue is ...
... 5.80c + 9.00·(3c) = 984.00
... 32.80c = 984.00 . . . . . . . . . . simplify
... c = 984.00/32.80 = 30 . . . . . divide by the coefficient of c
1. The expressionx^3+3x^2+x-5 represents the total length across the front of the mansion. Find the length of side I. Show all work. X will stay a variable and your answer will be a polynomial
2. 2. The owners of the mansion want to install a new security system to protect the outside of their house. To get an estimate for the cost of the new security system they need to know the total distance around the outside of the mansion.
a. How many sides does the Mansion have?
b. What side would be the same length as side L?
c. What side would be the same length as side D?
d. Find an expression for the perimeter of the mansion. Show all work. X will stay a variable and your answer will be a polynomial.
3. The owners of the mansion also want to install new AC units. You must know the amount of air on the first floor of the mansion to determine the size of AC units necessary to function properly. The first floor of the mansion covers, or has a base, 15x^4+20x^2+45x+590 square feet. If the height of the ceilings on the first floor is 5x-3, find the total volume of air on the first floor. Use the formula V=Bh where Bis the area of the base and his the height. Show all work. X will stay a variable and your answer will be a polynomial.
4. The area of the Gothic Room in the mansion’s layout is2x^3+25x^2+169, what are the dimensions (length and width) for the room? Side E is x + 13. Use synthetic division to find the other side width. Show all work. X will stay a variable and your answer will be a polynomial.
A baseball team has a goal of hitting more than 84 home runs this season. They average 7 home runs each game and have already hit 35 home runs so far. How many more games, x, will it take the baseball team to reach its home run hitting goal if they continue to average 7 home runs per game?
Final answer:
The baseball team needs to play 7 more games to exceed its goal of 84 home runs, based on their current average of 7 home runs per game.
Explanation:
The baseball team has hit 35 home runs and wants to hit more than 84. To find how many more games it will take, we first calculate the total number of home runs needed to surpass 84, which is 84 - 35 = 49 home runs. Since the team averages 7 home runs per game, we divide the remaining home runs needed by the average per game to find x, the number of games needed: 49 home runs / 7 home runs per game = 7 games.
Therefore, the baseball team needs to play 7 more games to reach its goal, assuming the average stays constant.
A digit thermometer reports a temperature of 32*F as being 32.02*F. Which of the followings true?
A. The thermometer is both accurate and precise.
B. The thermometer is neither accurate nor precise.
C. The thermometer is precise, but not accurate.
D. The thermometer is accurate, but not precise.
Answer: The thermometer is both accurate and precise
Step-by-step explanation: Hope this helped!!
Help Please.
1 inch=2.54 centimeters
68 centimeters= ..... inches
(round the answer to two decimal places)
which is the longer length 29ft or 9 yards
To compare 29 feet and 9 yards, convert 9 yards to feet, which equals 27 feet. Since 29 feet is greater than 27 feet, 29 feet is longer.
To determine which length is longer between 29 feet and 9 yards, we need to convert one of the measurements to the same unit. We know that 1 yard is equal to 3 feet. Therefore, to convert 9 yards to feet:
9 yards x 3 feet/yard = 27 feetComparing the two lengths, 29 feet is longer than 27 feet.
Thus, 29 feet is the longer length.
Find the solution to the linear system of differential equations {x′y′==−5x+3y−18x+10y satisfying the initial conditions x(0)=4 and y(0)=11
The problem given is a linear system of differential equations with initial conditions, but the system is not properly defined and appears to have a typo. Normally, such a system would be in the form x' = ax + by and y' = cx + dy, with initial conditions that would determine the particular solution.
Explanation:This question is about solving a linear system of differential equations with initial conditions, specifically the system {x′y′==−5x+3y−18x+10y with the initial conditions x(0)=4 and y(0)=11. However, there seems to be a typo, as the system is not properly defined and doesn't make sense as written. Under normal conditions, such a system would be in the form x' = ax + by and y' = cx + dy, where a,b,c,d are constants and x' and y' are the derivatives of x and y respectively.
Additionally, the initial conditions x(0)=4 and y(0)=11 would serve to define the particular solution for the system of differential equations. Correcting and resolving such typos would be the first step in progressing towards a solution.
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Maria put $500 into a savings account. She made no more deposits or withdrawals. The account earns 2% simple interest per year. How much money will be in the account after 5 years?5,000,50,550,1000
A particle moving along a hyperbola xy =8. as it reaches the point (4,2), the y-coordinate is decreasing at a rate of 3cm/s. how fast is the x-coordinate of the point changing at that instant.
The x-coordinate of the point is changing at a rate of [tex]\( 6 \text{ cm/s} \)[/tex].
To determine how fast the x-coordinate of the particle is changing at the instant it reaches the point (4, 2), we start with the equation of the hyperbola and apply the related rates method.
Given:
[tex]\[ xy = 8 \][/tex]
Differentiate both sides of the equation with respect to time [tex]\( t \)[/tex]:
[tex]\[ \frac{d}{dt}(xy) = \frac{d}{dt}(8) \][/tex]
Using the product rule on the left side:
[tex]\[ x \frac{dy}{dt} + y \frac{dx}{dt} = 0 \][/tex]
We need to find [tex]\(\frac{dx}{dt}\)[/tex] when the particle is at the point [tex]\((4, 2)\)[/tex] and [tex]\( \frac{dy}{dt} = -3 \text{ cm/s} \)[/tex] (since the y-coordinate is decreasing).
Substitute [tex]\( x = 4 \)[/tex], [tex]\( y = 2 \)[/tex], and [tex]\( \frac{dy}{dt} = -3 \)[/tex] into the differentiated equation:
[tex]\[ 4 \left( -3 \right) + 2 \frac{dx}{dt} = 0 \][/tex]
Simplify and solve for [tex]\( \frac{dx}{dt} \)[/tex]:
[tex]\[ -12 + 2 \frac{dx}{dt} = 0 \][/tex]
[tex]\[ 2 \frac{dx}{dt} = 12 \][/tex]
[tex]\[ \frac{dx}{dt} = 6 \][/tex]
which statements are true about the regular polygon? check all that apply.
its 1, 3, and 5 I think
Answer:
1) False
2) True
3) True
4) False
5) True
Step-by-step explanation:
We are given the following information in the question:
1) False
The sum of measures of interior angle is given by:
[tex](n-2)\times 180^\circ\\\text{where n is the number of sides in regular polygon}[/tex]
Putting n = 5
Sum of interior\r angle = [tex](5-2)\times 180 = 3\times 180 = 540^\circ[/tex]
2) True
Each interior angle measure =
[tex]\displaystyle\frac{\text{Sum of interior angles}}{\text{Number of sides}} = \frac{540}{5} = 108^\circ[/tex]
3) True
All the angles in a regular polygon are equal.
4) False
The polygon is a regular pentagon.
5) True
The sum of measures of interior angle is given by:
[tex]180^\circ(5-2)[/tex]
Given that the points (-1, 6), (3, 6), (3, 1), and (-1, 1) are vertices of a rectangle, how much shorter is the width than the length?
Answer:
1 unit shorter
Step-by-step explanation:
By plotting the given points in the coordinate plane,
We get a rectangle ABCD having vertices,
A(-1,6), B (3,6), C (3,1), D (-1,1)
By the distance formula,
Shorter side or width of the rectangle,
[tex]AB=\sqrt{(3-(-1))^2+(6-6)^2}=\sqrt{4^2+0}=4\text{ unit}[/tex]
Longer side or length of the rectangle,
[tex]BC=\sqrt{(3-3)^2+(1-6)^2}=\sqrt{5^2}=5\text{ unit}[/tex]
The difference between length and width,
[tex]BC - AB = 5 - 4 = 1\text{ unit}[/tex]
Hence, the width of rectangle is 1 unit less than the length.
please can you help me!
z-² as a fraction
Reuben bought a desktop computer and a laptop computer. Before finance charges, the laptop cost $150 more than the desktop. He paid for the computers using two different financing plans. For the desktop the interest rate was 7% per year, and for the laptop it was 9.5% per year. The total finance charges for one year were $303 . How much did each computer cost before finance charges?
Kwan's parents bought a home for $50,000 in 1997 just as real estate values in the area started to rise quickly. Each year, their house was worth more until they sold the home for $309,587. Model the growth of the home's value from 1997 to 2007 with both linear and an exponential equation. Graph the two models below.
A. First let us start with the linear model.
The equation is in the form of y = m x + b
Calculating for the slope m:
m = (309,587 – 50,000) / (2007 – 1997)
m = 25,958.7
Subsituting:
y = 25,958.7 x + b
Taking x = 1997, y = 50,000. Solve for b:
50,000 = 25,958.7 (1997) + b
b = -51,789,523.9
The complete equation is therefore:
y = 25,958.7 x - 51,789,523.9
B. The exponential model has the following form:
y = a b^x
where a and b are constants
Taking x1= 1997, y1 = 50,000; x2 = 2007, y2 = 309,587
50,000 = a b^1997
309,587 = a b^2007
Combining in terms of a:
50,000 / b^1997 = 309,587 / b^2007
b^2007 / b^1997 = 309,587 / 50,000
b^10 = 6.19174
b = 1.2
Substituting:
y = a 1.2^x
Solving for a:
50,000 = a 1.2^1997
a = 3.75 x 10^-154
The complete equation is:
y = 3.75 x 10^-154 * 1.2^x