Answer:
Oil: 24 ml; Onion: 56 g; Potatoes: 0.36 kg; Milk: 0.44 l
Step-by-step explanation:
First, we see how much of the soup recipe he wants make.
4 portions out of 20 portions = 4/20 = 1/5 = 0.2
He wants to make 0.2 of the amount of the recipe.
Now we multiply every amount by 0.2
Oil: 0.2 * 120 ml = 24 ml
Onion: 0.2 * 280 g = 56 g
Potatoes: 0.2 * 1.8 kg = 0.36 kg
Milk: 0.2 * 2.2 l = 0.44 l
Richard needs to use a scaling factor to reduce the amounts of each ingredient to make 4 portions of potato soup, resulting in 24 ml oil, 56 g onion, 360 g potatoes, and 0.44 liters of milk. Devon will require 37.5 liters of soup for a party of 100 guests.
To scale down the recipe from 20 portions to 4 portions of potato soup, Richard needs to multiply each ingredient by the scaling factor, which is 4/20 or 1/5. Here's how to calculate the amounts needed:
Oil: 120 mlTherefore, for 4 portions, Richard needs 24 ml of oil, 56 g of onion, 360 g of potatoes, and 0.44 liters of milk.
A stone is thrown straight up from the edge of a roof, 775 feet above the ground, at a speed of 16 feet per second. A. Remembering that the acceleration due to gravity is −32ft/sec2, how high is the stone 4 seconds later?
Final answer:
The stone is approximately 583 feet high 4 seconds later.
Explanation:
To find the height of the stone 4 seconds later, we can use the equation of motion for an object in free fall:
h = h0 + v0t + (1/2)gt^2
Where:
h = height at time t
h0 = initial height
v0 = initial velocity
g = acceleration due to gravity
t = time
Substituting the given values:
h = 775 + 16(4) + (1/2)(-32)(4)^2
h = 775 + 64 - 256
h = 583 feet
Therefore, the stone is approximately 583 feet high 4 seconds later.
The angle measurements in the diagram are represented by the following expressions.
Solve for X then find the measurement of ∠A:
∠A = ∠B
6x + 12 = 3x + 63
6x - 3x = 63 - 12
3x = 51
x = 51 ÷ 3
x = 17
6(17) + 12
102 + 12
∠A = 114°
Answer:
114
Step-by-step explanation:
answer correctly / explain a lil.
Which relation could be rewritten using FUNCTION notation?
A) x = 3
B) x + y = 3
C) x + y2 = 3
D) x2 + y2 = 3
Answer:
B) x + y = 3
Step-by-step explanation:
This is a specific way to give details without a detailed written explanation of the function. There will be NO exponents when trying to find out information about something:
[tex]\displaystyle x + y = 3 → y = -x + 3[/tex]
I am joyous to assist you anytime.
ABC is reflected across x = 1 and y = -3. What are the coordinates of the reflection image of A after both reflections?
(-2, -7) (-2, 7) (7, -2) (7, 2)
Answer:
option C) (7, -2)
Step-by-step explanation:
By the graph, the initial coordinates of point A are ( -5, -4)
first reflection along the line x=1, only the x coordinate will change.
the new x coordinate is = x = 7
thus the point becomes (7, -4)
similarly, reflection along y= -3, only the y coordinate will change.
the new y coordinate is = y = -2
thus the final coordinates are (7, -2)
It has been observed that some persons who suffer acute heartburn, again suffer acute heartburn within one year of the first episode. This is due, in part, to damage from the first episode. The performance of a new drug designed to prevent a second episode is to be tested for its effectiveness in preventing a second episode. In order to do this two groups of people suffering a first episode are selected. There are 55 people in the first group and this group will be administered the new drug. There are 45 people in the second group and this group will be administered a placebo. After one year, 11% of the first group has a second episode and 9% of the second group has a second episode. Conduct a hypothesis test to determine, at the significance level 0.1, whether there is reason to believe that the true percentage of those in the first group who suffer a second episode is different from the true percentage of those in the second group who suffer a second episode? Select the [Rejection Region, Decision to Reject (RH0) or Failure to Reject (FRH0)]
A. [ z < -1.65, RHo]
B. [ z < -1.65 and z > 1.65, FRHo
C. [z > 1.65, FRHo]
D. [z < -1.65 and z > 1.65, FRHo]
E. [z > -1.65 and z < 1.65, RHo]
F. None of the above
The equation d=11cos(8pi/5 t) models the horizontal distance, d, in inches of the pendulum of a grandfather clock from the center as it swings from right to left and left to right as a function of time, t, in seconds. According to the model, how long does it take for the pendulum to swing from its rightmost position to its leftmost position and back again? Assume that right of center is a positive distance and left of center is a negative distance. A. 0.625 seconds B. 0.8 seconds C. 1.25 seconds D. 1.6 seconds
Answer:
The time it takes for the pendulum to swing from its rightmost position to its leftmost position and back again is 1.25 seconds.
Step-by-step explanation:
Given the equation
[tex]d = 11cos( \frac{8\pi}{5}*t)[/tex]-----------Equation 1
where d, in inches of the pendulum of a grandfather clock from the center.
Comparing with the standard equation of an oscillating pendulum bob.
[tex]d = Acos (wt + \alpha )[/tex] ----------Equation 2
where ω = angular velocity
t = time taken
α = The angular displacement when t = 0
Comparing equation 1 and 2,
α = 0
[tex]w =\frac{8\pi }{5}[/tex]
Recall that [tex]w = 2\pi f
Therefore,
[tex]2\pi f = \frac{8\pi }{5} \\\\f = \frac{4}{5}[/tex][/tex]
f = 0.8 Hertz
Recall that [tex]f = \frac{1}{T}[/tex]
[tex]T = \frac{1}{0.8}[/tex]
T = 1.25 seconds
Therefore, the time it takes for the pendulum to swing from its rightmost position to its leftmost position and back again is 1.25 seconds.
A truck costs $16,000 with a residual value of $1,000. It has an estimated useful
life of five years. If the truck was bought on July 3, what would be the book
value at the end of year 1 using straight-line rate?
A. $1,500
B. $16,000
C. $12,500
D. $14,500
Answer:
Option D.
Step-by-step explanation:
Cost of truck = $16000
Residual value after 5 years = $1000
Depreciated value of a truck in 5 year is
[tex]Depreciation=16000-1000=15000[/tex]
In straight-line method, the value of a fixed asset depreciate by a constant rate.
Since depreciation of truck in 5 years is $15000, therefore, the depression of one year is
1 year Depreciation = [tex]\dfrac{15000}{5}=3000[/tex]
From July 3 to end of fist year = 1/2 year
1/2 year Depreciation = [tex]\dfrac{3000}{5}=1500[/tex]
So, the value at the end of year 1 using straight-line rate is
[tex]Value=16000-1500=14,500[/tex]
Therefore, the correct option is D.
ASAP PLZ!!! Select the correct answer. Which equation cannot be solved by factoring? A. x2 + 5x − 4 = 0 B. x2 + 6x + 9 = 0 C. x2 + 3x − 4 = 0 D. x2 − x − 6 = 0
Answer:
Step-by-step explanation:
We have four equations here. Let's actually solve them, using factoring if possible and some other method if factoring is not possible.
A) x^2 + 5x + 4 factors into (x + 1)(x + 4), but x^2 + 5x - 4 does not.
B) x^2 + 6x + 9 factors into (x + 3)^2.
C) x^2 + 3x - 4 factors into (x + 4)(x - 1).
D) x^2 - x - 6 factors into (x - 3)(x + 2)
x^2 + 5x - 4 = 0 can be solved, but not by factoring.
The radius of a spherical is decreasing at a constant rate of 3 cm per second. Find, in cubic centimeters per second, the rate of change of the volume of the ball when the radius is 5cm.
The rate of change of the volume of a ball when the radius is 5cm is -300π cubic centimeters per second.
Explanation:To find the rate of change of the volume of a ball, we can use the formula for the volume of a sphere, which is V = (4/3)πR³. We are given that the radius is decreasing at a constant rate of 3 cm per second. So, the rate of change of the volume can be found using the derivative of the volume function with respect to time.
First, we differentiate the volume function with respect to time:
dV/dt = (4/3)π×3R²×(-3)
dV/dt = -12πR²
Then we substitute the given value of the radius when it is 5 cm:
dV/dt = -12π×5²
dV/dt = -12π×25
dV/dt = -300π
Therefore, the rate of change of the volume of the ball when the radius is 5 cm is -300π cubic centimeters per second.
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A model rocket has upward velocity v(t) = 10t2 ft/s, t seconds after launch. Use the interval [0, 6] with n = 6 and equal subintervals to compute the following approximations of the distance the rocket traveled. (Round your answers to two decimal places.
(a) Left-hand sum = _____ ft
(b) Right-hand sum = _____ ft
(c) average of the two sums = ______ ft
Answer:
a)550
b)910
c)730
Step-by-step explanation:
The given model is
[tex]v(t) = 10t^2 ft/s[/tex]
Use the interval [0,6], with n=6 rectangles
Then, the interval width is
[tex]\Delta t = \frac{b-a}{n}[/tex]
[tex]\Delta t = \frac{6-0}{6}[/tex]= 1
so, the sub intervals are
[0,1], [1,2], [2,3], [3,4],[4,5],[5,6]
Now evaluating the function values
[tex]f(t_0)= f(0) = 0[/tex]
[tex]f(t_1)= f(1) = 10[/tex]
[tex]f(t_2)= f(2) = 40[/tex]
[tex]f(t_3)= f(3) = 90[/tex]
[tex]f(t_4)= f(4) = 160[/tex]
[tex]f(t_5)= f(5) = 250[/tex]
[tex]f(t_6)= f(6) = 360[/tex]
a) left hand sum is
L_6 = [tex]\Delta t [f(t_0)+ f(t_1)+f(t_2)+f(t_3)+f(t_4)+f(t_5)][/tex]
=[tex]1 [0+ 10+40+90+160+250][/tex]
= 550
b) right hand sum
R_6 = [tex]\Delta t [ f(t_1)+f(t_2)+f(t_3)+f(t_4)+f(t_5)+f(t_6)][/tex]
= [tex]1 [10+40+90+160+250+360][/tex]
= 910
c) average of two sums is
[tex]\frac{L_5+R_5}{2}[/tex]
= [tex]\frac{550+910}{2}[/tex]
=730
If the coefficient of determination is a positive value, then the regression equation a. must have a negative slope b. must have a positive slope c. could have either a positive or a negative slope d. must have a positive y intercept
If the coefficient of determination is a positive value, then the regression equation could have either a positive or a negative slope.
Explanation:If the coefficient of determination is a positive value, then the regression equation could have either a positive or a negative slope.
The coefficient of determination, denoted as r², is equal to the square of the correlation coefficient, r. It represents the percentage of variation in the dependent variable, y, that can be explained by variation in the independent variable, x, using the regression line. When r² is positive, it indicates a positive relationship between x and y, but it does not specify the direction of the slope.
Therefore, if the coefficient of determination is positive, the regression equation could have either a positive or a negative slope.
Kyle says 3/5 is equal to 60%. Which statement explains Kyle is correct?
A) Kyle is correct because 3/5 is equivalent to 10/6 .
B) Kyle is correct because 3/5 is equivalent to 60/100 .
C) Kyle is incorrect because 3/5 is less than 1 and 60% is greater than 1.
D) Kyle is incorrect because 3/5 is not a whole number and 60 is a whole number.
Kyle is correct in saying that 3/5 is equal to 60% because 3/5 is equivalent to 60/100.
Explanation:Kyle says that 3/5 is equal to 60%. This statement can be explained by saying that 3/5 is equivalent to 60/100. To convert a fraction to a percentage, you multiply the top number (numerator) by 100 and then divide by the bottom number (denominator). In this case, multiplying 3 by 100 gives you 300, and when you divide 300 by 5, it equals 60. Hence, 3/5 is indeed equivalent to 60%, which makes Kyle's statement correct.
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Enter the equation of the parabola in vertex form that has its vertex at (4,–13) and passes through the point (6,–5).
Answer:
Step-by-step explanation:
If you plot the vertex and the point that it goes through, the point it goes through is above the vertex, so the vertex is a positive one that opens upwards. The general vertex form of a parabola of this type is
[tex]y=a(x-h)^2+k[/tex]
We have the x, y, h, and k. We will plug all those in and solve for a. That looks like this:
[tex]-5=a(6-4)^2-13[/tex] which simplifies to
-5 = 4a - 13 and
8 = 4a so
a = 2
That means that the paraobola in vertex form is
[tex]y=2(x-4)^2-13[/tex]
According to Harper's Index, 55% of all federal inmates are serving time for drug dealing. A random sample of 16 federal inmates is selected.
(a) What is the probability that 11 or more are serving time for drug dealing? (Round your answer to three decimal places.)
(b) What is the probability that 2 or fewer are serving time for drug dealing? (Round your answer to three decimal places.)
(c) What is the expected number of inmates serving time for drug dealing? (Round your answer to one decimal place.)
Answer:
a)[tex]P(X\geq 11) = 0.198[/tex]
b)[tex]P(X\leq 2) = 0.000565[/tex]
c) Mean = 8.8
Step-by-step explanation:
1) Previous concepts
Binomial Distribution is a "discrete probability distribution which is used to calculate the probabilities for the independent trials and for each trial there is only two outcomes success or failure and probability for each success remains constant throughout each trial".
The Binomial distribution is a type of Bernoulli experiment with following properties:
a)There are two possible outcomes; success or failure.
b) Outcomes are independent on preceding result of a trial.
c) The probability of success remains constant throughout the experiment.
d)The number of successes are fixed.
The probability mass function for the Binomial distribution is given by:
[tex]P(X=a)=(nCa)(p)^x (1-p)^{n-x}[/tex]
Where [tex]p[/tex] is the probability of success, n the number of trials and x the number of successes that we want on the n trials.
[tex]X[/tex] represent the number federal inmates that are serving time for drug dealing
[tex]p=0.55[/tex] represent the proportion of federal inmates that are serving time for drug dealing
[tex]n=16[/tex] random sample selected
2) Part a
The random variable X follows this distribution [tex]X \sim Binom(n,p)[/tex]
On this case we want the following probability, and since says greater or equal than 11 we can express like this:
[tex]P(X \geq 11)=P(X=11)+P(x=12)+P(x=13)+P(x=14)+P(x=15)+P(x=16)[/tex]
[tex]P(X=11)=(16C11)(0.55)^{11} (1-0.55)^{5} =0.112[/tex]
[tex]P(X=12)=(16C12)(0.55)^{12} (1-0.55)^{4} =0.0572[/tex]
[tex]P(X=13)=(16C13)(0.55)^{13} (1-0.55)^{3} =0.0215[/tex]
[tex]P(X=14)=(16C14)(0.55)^{14} (1-0.55)^{2} =0.00563[/tex]
[tex]P(X=15)=(16C15)(0.55)^{15} (1-0.55)^{1} =0.000918[/tex]
[tex]P(X=16)=(16C16)(0.55)^{16} (1-0.55)^{0} =0.00007011[/tex]
[tex]P(X \geq 11)=0.112+0.0572+0.0215+0.00563+0.000918+0.00007011=0.198[/tex]
3) Part b
[tex]P(X \leq 2)=P(X=0)+P(x=1)+P(x=2)[/tex]
[tex]P(X=0)=(16C0)(0.55)^{0} (1-0.55)^{16} =0.00000283[/tex]
[tex]P(X=1)=(16C1)(0.55)^{1} (1-0.55)^{15} =0.0000552[/tex]
[tex]P(X=2)=(16C2)(0.55)^{2} (1-0.55)^{14} =0.000507[/tex]
[tex]P(X \leq 2)=0.00000283+0.0000552+0.000507=0.000565[/tex]
4) Part c
The expected value for the binomial distribution is given by the following formula:
[tex] E(X)=np=16*0.55=8.8[/tex]
So then the average number of federal inmates that are serving time for drug dealing on a sample of 16 is approximately 9.
Please answer this question correctly I need it today please show work
Answer:
1: C(n) = 2.50 + 16n
2: $66.50
Step-by-step explanation:
Part 1
Each ticket costs $16 per person. If tickets for n persons were purchased, the total cost would be 16n.
There is also a one-time service fee of $2.50 that must be paid. Thus, for n tickets the total cost is
C(n) = 2.50 + 16n
Part 2
For n = 4, the expression evaluates to
C(4) = 2.50 + 16 (4) = $66.50
How does the graph of g(x) = (x − 1)3 + 5 compare to the parent function f(x) = x3?
g(x) is shifted 1 unit to the right and 5 units up.
g(x) is shifted 5 units to the right and 1 unit up.
g(x) is shifted 1 unit to the left and 5 units up.
g(x) is shifted 5 units to the right and 1 unit down.
Answer:
A
Step-by-step explanation:
Given:
- The original function is:
f(x) = x^3
Find:
How does the graph of g(x) = (x − 1)3 + 5 compare to the original function.
Solution:
- We have a general form of the new function relating to parent function.
g(x) = a*( x +/- b )^n + c
Where; a, b and c are constants.
- The constant a magnitude denotes steepness of the graph relative to 1 and the sign of a will determine the mirror image of the graph about line y = 0.
- The constant b magnitude denotes shifts of the graph of every x value sign of b will determine the direction of shifts. + b : shift left , - b shift right.
- The constant c magnitude denotes shifts of the graph of every y value. sign of c will determine the direction of shifts. + c : shift up , - b shift down.
- In our g(x). a = 1 , b = -1 , c = + 5
Hence, g(x) is shifted 1 unit to the right and 5 units up.
The graph of g(x) = (x - 1)^3 + 5 is shifted 1 unit to the right and 5 units up compared to the parent function f(x) = x^3.
Explanation:The graph of g(x) = (x - 1)3 + 5 is obtained by shifting the graph of f(x) = x3 one unit to the right and five units up. Shifting a function horizontally is done by replacing x with (x - h), where h is the amount of units you want to shift.
In this case, g(x) = (x - 1)3 + 5 is equivalent to f(x - 1) + 5. So the graph is shifted 1 unit to the right. Shifting a function vertically is done by replacing f(x) with f(x) + k, where k is the amount of units you want to shift.
Since f(x - 1) + 5 is obtained by shifting f(x) one unit to the right and five units up, the correct answer is: g(x) is shifted 1 unit to the right and 5 units up.
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How much is a $26,000 automobile car worth after 1 year if the depreciation is 15% per year
Answer:
The worth of the automobile after an year with 15% depreciation is $22,100.
Step-by-step explanation:
The current cost of the automobile car = $26,000
The percentage of depreciation = 15%
Now, calculating the depreciated amount:
15% of $26,000 = [tex]\frac{15}{100} \times 26,000 = 3,900[/tex]
So, the depreciated amount of the car in the next year = $3,900.
Now, the worth of the car after an year
= CURRENT WORTH - THE DEPRECIATED AMOUNT
= $26,000 - $3,900.
= $22,100
Hence, the worth of the automobile after an year is $22,100.
The total surface of the cuboid is 112cm2 find the value of x bottom length 10cm side bottom length 2cm, id prefer just an answer as im about to get an hour detention, thank you
Answer:
The value of x is 3 cm.
Step-by-step explanation:
Given,
Total surface area of cuboid = 112 cm^2
Height of cuboid = 10 cm
Breadth of cuboid = 2 cm
Length of cuboid = x cm
Solution,
Formula for total surface of cuboid = [tex]2\times(length\times breadth +breadth\times height+height\times length)[/tex]
∴[tex]112=2(x\times2+2\times10+10\times x)\\112=2(2x+20+10x)\\112=2(12x+20)\\12x+20=\frac{112}{2}\\12x+20=56\\12x=56-20\\12x=36\\x=\frac{36}{12}=3[/tex]
Thus the length of cuboid is 3 cm.
Which point lies on the graph of the line? (5, 8) (1, 6) (–3, 3) (–4, 2)
Answer:
the answer is (-4,2)
Step-by-step explanation:
Answer:
Step-by-step explanation:
the answer is (-4,2)
Abigail is making flower bouquets. She has 16 roses and 20 carnations. She wants to make identical bouquets and use all the flowers.What is the greatest number of bouquets she can make?
Answer:
four bouquets
Step-by-step explanation:
The way of solving this problem is tell Abigail to keep the relation between flowers constant, that is
We have 16 roses and 20 carnations
16 2 16 = 2⁴ 20 2 20 = 2² * 5
8 2 10 2
4 2 5 5
2 2 1
1
So we will make bouquets of 4 roses and 5 carnations
so we will have 4 bouquets using all flowers
A municipality wanting to use integrated waste management methodologies for its citizens would do all of the following EXCEPT: A. pay for each individual's tipping fees at landfills with taxes B. offer curbside recycling to its residents C. attract businesses that utilize source reduction in their manufacturing processes D. offer mulch to its residents at no cost E. maintain a hazardous waste collection site for its residents
Answer:
A. pay for each individuals tipping fee at landfills with taxes
Step-by-step explanation:
Because it is a recyclic methodology .It is a service provide to household for dispose of the waste and recycled it. So as a municipality wanting to waste management so Curbside recycling can be used.
Municipal should attract business that utilize source reduction in their manufacturing.
They should offer much to its resident.
They maintain a hazardous waste collection site for its residents as well.
Mrs. Andretti is having new drapes made for her living room. The cost of the fabric is $15 per yard. The fee to make and hang the drapes is $250. She uses the expression 15x + 250 to calculate the total cost of the drapes. Mrs. Andretti states that x represents the total cost of the fabric. Is she correct?
Answer: No
Step-by-step explanation:
X does not represent the cost of fabric. X represents the number of yards of fabric used.
15x + 250
Could be read as ($15 × # of yards) + $250
So she has to pay $15 per yard of fabric plus an additional $250 base amount for having them made and hung in the first place.
She could use an additional variable to represent the cost of fabric.
Example: Y
Y= 15x
Cost of fabric is equal to $15 per yard × # of yards.
The equation for the total cost depending on the number of students in Emma's Extreme Sports classes is C = 50 + 20x.
C = 50 + 20x
Where C represents the total cost, 50 is the fee per class, and 20 is the cost per student.
If anyone knows this can you please help i have about an hour left to submit this (:
Find the area of a triangle with the given vertices.
Part I: Graph the following points on the coordinate grid below.
(1, -3), (3, -1), (5, -3)
Part II: Find the area of the triangle. Show your work.
Answer:
Part 1 : Figure show the graph of triangle
Part 2 : The area of triangle is 4 sqaure units
Step-by-step explanation:
Given points A(1, -3), B(3, -1) and C(5, -3) make triangle.
Part 1:
Figure show the graph of triangle with A(1, -3), B(3, -1) and C(5, -3) as vertices.
Part 2: Find the area of the triangle.
The area of triangle is given by A=[tex]\frac{(Base)(height)}{2}[/tex]
From figure, Take base as length of AC
Length of line is given by L=[tex]\sqrt{(X1-X2)^{2}+(Y1-Y2)^{2} }[/tex]
Now, Base = length of AC
Base =[tex]\sqrt{(X1-X2)^{2}+(Y1-Y2)^{2} }[/tex]
=[tex]\sqrt{(1-5)^{2}+((-3)-(-3))^{2}}[/tex]
=[tex]\sqrt{(-4)^{2}+(0)^{2}}[/tex]
=[tex]\sqrt{16}[/tex]
=4units
and Height as difference of y-component of point A and point B
Height = (y of component of point B)- (y of component of point A)
= (-1)- (-3)
= 2units
Therefore, The area of triangle is given by A=[tex]\frac{(Base)(height)}{2}[/tex]
A=[tex]\frac{(4)(2)}{2}[/tex]
A=4 sqaure units
Help those 3 multiple choice questions correctly and show work please I need it today
A belt runs a pulley of radius 8 inches at 60 revolutions per minute. a) Find the angular speed in radians per minute. b) Find the linear speed in inches per minute.
Answer:
Part a) [tex]120\pi\ \frac{rad}{min}[/tex]
Part b) [tex]960\pi\ \frac{in}{min}[/tex]
Step-by-step explanation:
we have
60 rev/min
Part a) Find the angular speed in radians per minute
we know that
One revolution represent 2π radians (complete circle)
so
[tex]1\ rev=2\pi \ rad[/tex]
To convert rev to rad, multiply by 2π
[tex]60\ \frac{rev}{min}=60(2\pi)=120\pi\ \frac{rad}{min}[/tex]
Part b) Find the linear speed in inches per minute
we know that
The circumference of a circle is equal to
[tex]C=2\pi r[/tex]
we have
[tex]r=8\ in[/tex] ----> given problem
substitute
[tex]C=2\pi(8)[/tex]
[tex]C=16\pi\ in[/tex]
Remember that
One revolution subtends a length equal to the circumference of the circle
so
[tex]1\ rev=16\pi\ in[/tex]
To convert rev to in, multiply by 16π
[tex]60\ \frac{rev}{min}=60(16\pi)=960\pi\ \frac{in}{min}[/tex]
Final answer:
The angular speed of the pulley is 120π radians per minute, and the linear speed is 960π inches per minute.
Explanation:
The question pertains to angular and linear speeds related to circular motion. Given that a belt runs a pulley with a radius of 8 inches at 60 revolutions per minute (rpm), we are tasked with finding both the angular speed in radians per minute and the linear speed in inches per minute.
Calculating the Angular Speed
The angular speed (ω) in radians per minute can be calculated using the formula ω = 2π×rpm, where rpm is the number of revolutions per minute and 2π radians is the equivalent of one full revolution.
ω = 2π × 60 = 120π radians/minute
Calculating the Linear Speed
The linear speed (v) can be determined from the radius (r) and angular speed (ω) using the formula v = r×ω. The radius of the pulley is 8 inches, so:
v = 8 inches × 120π radians/minute = 960π inches/minute
An investment of d dollars at k percent simple annual interest yields $600 interest over a 2-year period. In terms of d, what dollar amount invested at the same rate will yield $2,400 interest over a 3-year period?A. (2d)/3
B. (3d)/4
C. (4d)/3
D. (3d)/2
E. (8d)/3
Answer:
easey
Step-by-step explanation:
An electric sale gives a reading equal to the true weight plus a random error that isnormally distributed with mean 0 and standard deviationσ=.1 mg. Suppose that the results of fivesuccessive weightings of the same object are as follows:_______ 3.142, 3.163, 3.155, 3.150, 3.141.(a) Determine a 95 percent confidence interval estimate of the true weight.
(b) Determine a 99 percent confidence interval estimate of the true weight.
Answer:
a) 95% confidence interval estimate of the true weight is (3.026, 3.274)
b) 99% confidence interval estimate of the true weight is (2.944, 3.356)
Step-by-step explanation:
Confidence Interval can be calculated using M±ME where
M is the mean of five successive weightings (3.150)ME is the margin of error from the meanAnd margin of error (ME) can be calculated using the formula
ME=[tex]\frac{t*s}{\sqrt{N} }[/tex] where
t is the corresponding statistic in the given confidence level and degrees of freedom(t-score) s is the standard deviation of the random error (0.1)N is the sample size (5)Using the numbers 95% confidence interval estimate of the true weight is:
3.150±[tex]\frac{2.776*0.1}{\sqrt{5} }[/tex]≈3.150±0.124
And 99% confidence interval estimate of the true weight is:
3.150±[tex]\frac{4.604*0.1}{\sqrt{5} }[/tex]≈3.150±0.206
One of the roots of the equation 2x^2−bx−20=0 is −2.5. Find the other root
Answer:
The answer to your question is x = 4
Step-by-step explanation:
2x² - bx - 20 = 0
One root is -2.5
Process
Get the value of the equation when x = -2.5
2(-2.5)² - b(-2.5) - 20 = 0
2(6.25) + 2.5b - 20 = 0
12.5 + 2.5b - 20 = 0
2.5b = 20 - 12.5
2.5b = 7.5
b = 7.5 / 2.5
b = 3
Then
2x² - 3x - 20 = 0
Factor the polynomial
2 x -20 = -40
2x² -8x + 5x - 20 = 0
2x(x - 4) + 5(x - 4) = 0
(x - 4)(2x + 5) = 0
x₁ - 4 = 0 2x₂ + 5 = 0
x₁ = 4 x₂ = -5/2
x₂ = -2.5
Answer:
The "other" or "second" root is 4.
Step-by-step explanation:
We are told that -2.5 is a root of the equation. The coefficient b of the x term is unknown, and must be determined. Because -2.5 is a root, synthetic division with -2.5 as divisor must return a remainder of zero.
Setting up synthetic division, we arrive at:
-2.5 / 2 -b -20
-5 +12.5 + 2.5b
-------------------------------------
2 -5-b -7.5 + 2.5b
The remainer, -7.5 + 2.5b, must be zero (0). Thus, 2.5b = 7.5, and b = 3.
Then the other factor has the coefficients {2, -5-b}, and because b = 3, this comes out to coefficients {2, -8}.
The other factor is 2x - 8, which, if set equal to 0, yields x = 4. This is the "other root."
If the length of a rectangle is given by the expression 2 153 and the width is given by 4 68 , which radical expression represents the perimeter of the rectangle? A) 6 34 B) 14 17 C) 28 17 D) 32 17
Answer:
C) 28√17
Step-by-step explanation:
The perimeter is twice the sum of the two given side lengths, so is ...
P = 2(L +W) = 2(2√153 +4√68)
= 2(6√17 +8√17) = 2(14√17)
P = 28√17 . . . . . matches choice C
_____
This is about simplifying radicals. The applicable rules are ...
√(ab) = (√a)(√b)
√(a²) = |a|
__
153 = 9×17, so √153 = (√9)(√17) = 3√17
68 = 4×17, so √68 = (√4)(√17) = 2√17
_____
Comment on the problem presentation
It would help if there were actually radicals in the radical expressions. We had to guess based on the spacing and the answer choices.
In any event, this problem can be worked with a calculator. Find the perimeter (≈115.45) and see which answer matches that. (That's what I did in order to verify my understanding of what the radical expressions were.)
help me find the equation pls!!
Answer:
y(x) = e^(-2x +3)
Step-by-step explanation:
The graphed line has a "y-intercept" of 3 and a slope of -2, so its equation is ...
ln(y) = -2x +3
Taking antilogs, we get ...
y(x) = e^(-2x +3)