Use the distributive property to create an equivalent expression to 54+18x

Answers

Answer 1
18(x+3)

Just take out 18 from each term to get a binomial. Multiply what you factored out, 18, by the remaining binomial.
Answer 2

Answer:

An equivalent expression to 54+18x, using the distributive property is 18(3+x)

Step-by-step explanation:

In the problem we have the binomial (54+18x), and we are asked to use the distributive property, this means that we can find a factor wich is distributed in both terms of the binomial.

We know that any number, or in this case any polinomial (or binomial), can be multiplied times 1 and will stay the same number, and we only need to write this 1 in a way that could resolve our problem, in particular we can say that

[tex]1=\frac{18}{18}[/tex]

then we can distribute the denominator, so we calculate:

[tex](54+18x)=1(54+18x)=\frac{18}{18}(54+18x)=18(\frac{54}{18}+\frac{18x}{18})=18(3+x)[/tex]

And the equivalent expression to (54+18x) is 18(3+x).


Related Questions

find the perimeter of the semi-circular region at leat one please

Answers

6.) 15.7 because you would multiple 3.14 by the diameter of 5. Then divide by .5.
[tex]\bf \textit{area of a circle}\\\\ A=\pi r^2\qquad r=radius\\\\ -------------------------------\\\\ 3)\\\\ \textit{since the diameter is 20, then the radius is half that}\\\\ A=\pi 10^2\implies A=100\pi \\\\\\ 4)\\\\ r=14\qquad \qquad A=14^2\pi \implies A=196\pi \\\\\\ 5)\\\\ \textit{since the diameter is 8, then the radius is half that}\\\\ A=\pi 4^2\implies A=16\pi \\\\ -------------------------------\\\\ \textit{circumference of a circle}\\\\ C=2\pi r\\\\[/tex]

[tex]\bf -------------------------------\\\\ \textit{diameter is 5, so radius is 2.5 then}\\\\ \stackrel{\textit{circumference of the circle}}{2\pi 2.5}\implies 5\pi \qquad \qquad \stackrel{\textit{circumference of the semi-circle}}{\cfrac{5\pi }{2}} \\\\\\ 6)\\\\ \textit{diameter is 21, so radius is 10.5 then}\\\\ \stackrel{\textit{circumference of the circle}}{2\pi 10.5}\implies 21\pi \qquad \qquad \stackrel{\textit{circumference of the semi-circle}}{\cfrac{21\pi }{2}}[/tex]

Find the slope of the line whose equation is 4y - 3x + 6 = 0.

Answers

4y-3x+6=0, isolate y
4y=3x-6
y=3/4x-3/2

slope= 3/4 :)

Answer:

slope of the line will be [tex]\frac{3}{4}[/tex]

Step-by-step explanation:

We have to find the slope of a given line whose equation is 4y - 3x + 6 = 0

If a line is in the form of y = mx + c

Then m represents slope of the line

4y - 3x + 6 = 0     [ Given equation ]

4y = 3x - 6

y = [tex]\frac{1}{4}[/tex] ( 3x-6 )

y = [tex]\frac{3}{4}x[/tex] - [tex]\frac{3}{2}[/tex]

Therefore, slope of the line will be [tex]\frac{3}{4}[/tex]

In triangle ABC, a = 9, c = 5, and B = 120°. Find b2.

61
83.5
128.5
151

Answers

Answer:

The correct answer is 151.

Step-by-step explanation:

Given,

In triangle ABC,

BC = a = 9 unit,

AB = c = 5 unit,

m∠B = 120°,

We have to find : or AC²,

By the cosine law,

[tex]b^2=a^2+c^2-2ac cosB[/tex]

[tex]=9^2+5^2-2\times 9\times 5\times cos 120^{\circ}[/tex]

[tex]=81+25-90\times -0.5[/tex]

[tex]=81+25+45[/tex]

[tex]=151[/tex]

Hence, the value of [tex]b^2[/tex] is 151.

Answer:

Option D) [tex]b^2 = 151[/tex]  

Step-by-step explanation:

We are given the following information in the question:

[tex]\triangle ABC\\\text{Side } a = 9\text{ units}\\\text{Side } c = 5\text{ units}\\\angle ABC = 120^{\circ}[/tex]

We have to find [tex]b^2[/tex]

The law of cosines state that if a, b and c are the sides of triangle and b is the side opposite to angle B, then,

[tex]b^2 = a^2 + c^2 - 2ac~\cos(B)[/tex]

Putting the values, we have,

[tex]b^2 = (9)^2 + (5)^2 - 2(9)(5)~\cos(120)\\\\b^2 = 81 + 25 - 90(-0.5)\\\\b^2 = 151[/tex]

Option D) [tex]b^2 = 151[/tex]

Calculate all four second-order partial derivatives of f(x,y)=sin(2xy)

Answers

z = sin(2xy)   Ill use D for the partial differential sign

Dz/Dx =  2ycos(2xy)
Dz/Dy =  2xcos(2xy)

D^2z/Dx^2 = 2y.-2ysin(2xy)  = - 4y^2sin(2xy)
D^2z/Dy^2 =  -4x^2sin(2xy)

D^2z/Dy.Dx =  D/Dy( Dz/Dx) =  2y. -2xsin(2xy) + 2.cos(2xy) 

 =  -4xysin(2xy)  + 2 cos(2xy)

D^2z(Dx.Dy)  is the same as the latter.

in a certain town, 10% of people commute to work by bicycle. if a person is selected randomly from the town, what are the odds against selecting someone who commutes by bicycle?

Answers

Final answer:

The odds against selecting a person who commutes by bicycle from a town where 10% of people commute that way would be 9 to 1. This is based on the percentage of people who do not commute by bicycle versus those who do.

Explanation:

In statistical terms, the question is asking us to calculate the odds against selecting someone who commutes by bicycle. With 10% of people in this town commuting by bicycle, it means that 90% of them do not. Therefore, the odds against selecting someone who commutes by bicycle are 90 to 10 or 9 to 1.

This is calculated by dividing the number of unsuccessful outcomes (people not commuting by bicycle - 90%) by the number of successful outcomes (people commuting by bicycle - 10%). This gives us the odds against selecting someone who commutes by bicycle.

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Find the absolute minimum and absolute maximum values of f on the given interval. f(x) = x − ln 8x, [1/2, 2]

Answers

The given function is 
f(x) =  x - ln(8x), on the interval [1/2, 2].

The derivative of f is
f'(x) = 1 - 1/x
The second derivative is 
f''(x) = 1/x²

A local maximum or minimum occurs when f'(x) = 0.
That is,
1 - 1/x = 0  => 1/x = 1  => x =1.
When x = 1, f'' = 1 (positive).
Therefore f(x) is minimum when x=1.
The minimum value is
f(1) = 1 - ln(8) = -1.079

The maximum value of f occurs either at x = 1/2 or at x = 2.
f(1/2) = 1/2 - ln(4) = -0.886
f(2)  = 2 - ln(16) = -0.773
The maximum value of f is
f(2) = 2 - ln(16) = -0.773
A graph of f(x) confirms the results.

Answer: 
Minimum value  = 1 - ln(8)
Maximum value = 2 - ln(16)


Final answer:

To find the absolute minimum and absolute maximum values of the function f(x) = x - ln 8x on the interval [1/2, 2], we find the critical points and evaluate the function at the endpoints and critical points. The absolute minimum value is f(1/2) = 1/2 - ln 4 and the absolute maximum value is f(2) = 2 - ln 16.

Explanation:

To find the absolute minimum and absolute maximum values of the function f(x) = x - ln 8x on the given interval [1/2, 2], we need to find the critical points and the endpoints of the interval. First, we find the derivative of the function: f'(x) = 1 - 1/x. Then, we solve the equation f'(x) = 1 - 1/x = 0 to find the critical points. The critical point is x = 1. Next, we evaluate the function at the critical point and the endpoints of the interval to determine the absolute minimum and absolute maximum values.

1. Evaluating the function at the critical point: f(1) = 1 - ln 8
2. Evaluating the function at the endpoint x = 1/2: f(1/2) = 1/2 - ln 4
3. Evaluating the function at the endpoint x = 2: f(2) = 2 - ln 16

The absolute minimum and absolute maximum values of the function on the given interval are:

Absolute minimum value: f(1/2) = 1/2 - ln 4Absolute maximum value: f(2) = 2 - ln 16

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A is an unknown number. When you round A to the nearest thousand you get 21000. When you round A to the nearest hundred you get 20,500
What is A

Answers

20,490 is the answer i think. Hope it is right

Final answer:

The unknown number A, when rounded to the nearest thousand and hundred, is determined to be within the range from 20500 to 20549. A can be any number within this range.

Explanation:

In mathematics, when you're given that a number A, when rounded to the nearest thousand, ends up being 21000 or that when rounded to the nearest hundred, it ends up being 20500, you can infer that the unknown number A lies somewhere between two specific values. Since A rounds to 21000 when we round to the nearest thousand, this implies that A is between 20500 and 21499.

However, we also know that, when rounded to the nearest hundred, A is 20500. This implies that A is between 20450 and 20549. Comparing these two ranges, the unknown number A must lie within the common range, which is from 20500 to 20549. Therefore, the number A can be any number within this range.

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You drive 4 miles from your house to your friend's house. Your house is at an elevation of 622 feet. Your friend's house is at an elevation of 486 feet. What is the mean change in elevation per mile?

Answers

Just subtract 622 feet from 486 feet to get the change in elevation.  The result will be negative because your friend's house is at a lower elevation than yours.

Now find the mean change in elevation per mile by dividing (486 ft - 622 ft) by 4 miles:
                      -136 ft
                    -----------  = -34 ft/mile
                       4 mi

712 divided by 8 and show work

Answers

712/8=89
I don’t know how I would show the work though
712/8=89  I don't know the work to it





How many comparisons are needed for a binary search in a set of 64 elements?

Answers

Final answer:

A binary search in a set of 64 sorted items will, in the worst-case scenario, require 6 comparisons. This is calculated as log2(64) = 6. The binary search method works by repeatedly halving the search interval until it finds the desired item.

Explanation:

In order to find out how many comparisons are needed for a binary search in a set of 64 elements, we need to understand how a binary search works. It's an efficient algorithm that finds an item from a sorted list by repeatedly dividing the search interval in half. Every time it analyzes the middle element, it either discards the half that it is sure does not contain the desired item, or determines that the middle element is the desired item.

With a set of 64 elements, a binary search would perform log2(64) or 6 comparisons, as the base-2 logarithm of 64 is 6. Therefore, the maximum number of comparisons necessary using a binary search to locate a particular item in a set of 64 elements is 6 comparisons.

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Final answer:

In a binary search of a 64 element set, the worst-case scenario requires 6 comparisons. This is determined by the base 2 logarithm of the number of elements.

Explanation:

The number of comparisons in a binary search is governed by the logarithm base 2 of the number of elements in the set. With a set of 64 elements, the worst case scenario for the number of comparisons needed would be log2(64) which equals 6. This is because a binary search works by repeatedly dividing the searchable set in two until it finds the desired element, making it a very efficient search algorithm.

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The polynomial 6x2 + 37x – 60 represents an integer. Which expressions represent integer factors of 6x2 + 37x – 60 for all values of x?

Answers

(3x-4)(2x+15)

Hope this helps.

Answer with explanation:

The Given Quadratic Polynomial which can be Broken into integer factors:

 [tex]\rightarrow 6 x^2 + 37 x - 60\\\\ \text{Splitting the Middle term}}\\\\ \rightarrow 6 x^2 + 37 x - 60\\\\\rightarrow 6 x^2 + 45 x-8 x - 60\\\\ \rightarrow 3x \times (2 x+15)-4 (2 x +15)\\\\\rightarrow (3 x -4)(2 x+15)[/tex]

Factors of the above Expression are:

     = (3 x -4)(2 x+15)  

The circumference of a circular hot tub at a hotel is 56.5 yards. What is the diameter of the hot tub?

Answers

Final answer:

To find the diameter of the circular hot tub, divide the circumference by π.

Explanation:

To find the diameter of the circular hot tub, we need to use the formula for the circumference of a circle. The formula is C = πd, where C represents the circumference and d represents the diameter.

In this case, the circumference is given as 56.5 yards. So we can plug that value into the formula and solve for d: 56.5 = πd.

To isolate the variable d, we divide both sides of the equation by π. This gives us: d = 56.5/π.

Using a calculator, we can find the approximate value of d to be 18 yards.

The diameter of the hot tub is approximately 18 yards, calculated using the formula [tex]\(D = \frac{56.5}{\pi}\)[/tex] from the given circumference.

The circumference of a circle is given by the formula [tex]\(C = \pi \times D\)[/tex], where C is the circumference and D is the diameter. In this case, the circumference of the hot tub is given as 56.5 yards. So, the formula can be rearranged to solve for the diameter:

[tex]\[ C = \pi \times D \][/tex]

[tex]\[ 56.5 = \pi \times D \][/tex]

To find D, divide both sides of the equation by [tex]\(\pi\)[/tex]:

[tex]\[ D = \frac{56.5}{\pi} \][/tex]

Using the value of  [tex]\(\pi \approx 3.14159\)[/tex], the diameter D is approximately:

[tex]\[ D \approx \frac{56.5}{3.14159} \approx 18 \][/tex]

Therefore, the diameter of the hot tub is approximately 18 yards.

What is the degree of the polynomial
Xy^2 + 3x^2 - 7 + x

A) 2
B) 3
C) 1
D) 4

Answers

to check the degree of the polynomial, check the degree of each of its terms, and the highest one, is the degree of the polynomial, let's do so,

[tex]\bf xy^2+3x^2-7 \begin{cases} x^1y^2\impliedby &1+2\\ &\textit{degree of 3}\\ 3x^2\impliedby &2\\ &\textit{degree of 2}\\ 7\\ 7x^0y^0\impliedby &0+0\\ &\textit{degree of 0} \end{cases}[/tex]

so, notice the highest degree for the terms.

Help me please
which graph shows a triangle and it's reflection image over the x-axis?

Answers

A is because its over the x axis and reflects

X+y-2z=5
-x+2y+z=2
2x+3y-z=9

Answers

The solution to the system of equations is x = 1, y = 2, and z = -1.

The given system of equations is:

1. x + y - 2z = 5

2. -x + 2y + z = 2

3. 2x + 3y - z = 9

We can solve this system using various methods such as substitution, elimination, or matrices. Let's use the elimination method to solve this system:

1. Add equations (1) and (2):

(x + y - 2z) + (-x + 2y + z) = 5 + 2

x - x + y + 2y - 2z + z = 7

3y - z = 7   (Equation 4)

2. Multiply equation (2) by 2 and add it to equation (3):

2(-x + 2y + z) + (2x + 3y - z) = 2 × 2 + 9

-2x + 4y + 2z + 2x + 3y - z = 4 + 9

7y + z = 13  (Equation 5)

Now we have equations (4) and (5):

4. 3y - z = 7

5. 7y + z = 13

Let's solve this system by adding equations (4) and (5):

(3y - z) + (7y + z) = 7 + 13

3y + 7y = 20

10y = 20

y = 2

Now that we have found y = 2, we can substitute this value into either equation (4) or equation (5) to solve for z.

Let's use equation (4):

3(2) - z = 7

6 - z = 7

-z = 7 - 6

-z = 1

z = -1

Now that we have found y = 2 and z = -1, we can substitute these values into any of the original equations to solve for x.

Let's use equation (1):

x + 2 - 2(-1) = 5

x + 2 + 2 = 5

x + 4 = 5

x = 5 - 4

x = 1

Complete Question may be:

Solve the system of equations:

x + y - 2z = 5

-x + 2y + z = 2

2x + 3y - z = 9

Write the point-slope form of the given line that passes through the points (0, -3) and (4, 1). Identify (x1, y1) as (0, -3). Include your work in your final answer. Type your answer in the box provided or use the upload option to submit your solution.

Answers

The point slope form of the line has the following form:

y – y1 = m (x – x1)

 

The slope m can be calculated using the formula:

m = (y2 – y1) / (x2 – x1)

m = (1 - -3) / (4 – 0) = 1

 

So the whole equation is:

y – -3 = 1 (x – 0)

y + 3 = x

A diver is descending to reach the bottom of a lake. After 15 seconds, she is 90 feet below the surface of the water. If positive integers represent a distance above the surface of the lake, which integer best represents the diver’s change in position in feet per second?

Answers

dive distance traveled by time

 90 feet / 15 seconds = 6

 since the diver is below the surface they are changing position at -6 feet per second

graph the equation 5x-4y=-18

Answers

Here you go, see attachment.

Belmond, a brick-cutter in a kiln, cuts 84 bricks in 3 hours. Find the unit rate.

Please Help!!

Answers

We cuts 28 bricks every hour
84/3 = 28

The unit rate at which Belmond cuts bricks is 28 bricks per hour, which is calculated by dividing the total number of bricks (84) by the total hours worked (3).

To find the unit rate of bricks cut per hour by Belmond, we simply divide the total number of bricks by the total time in hours. Belmond cuts 84 bricks in 3 hours, so the unit rate is:

Unit rate = Total bricks \/ Total time in hours
Unit rate = 84 bricks \/ 3 hours = 28 bricks per hour

This means that Belmond cuts 28 bricks every hour. When you need to find a unit rate, it is a matter of dividing the total quantity by the time it takes to accomplish that quantity, thus yielding the rate per single time unit (in this case, per hour).

A softball player hits the ball. The height of the ball h (in feet) at any time t seconds after the hit will be represented by the quadratic function h(t)=42t‒6t2. Use what you have learned about the zeros of a quadratic function to determine which of the following statements is true.
A. The ball will reach the ground in 3.5 seconds.
B. The ball will get to its highest point in 7 seconds.
C. The ball will stay in the air for a total of 7 seconds.
D. The highest the ball will go is about 7 feet.

Answers

I think the answer is D. Not sure
h(t)=42t‒6t^2

When the height is 0, h(t) = 0.

42t - 6t^2 = 0

Now we solve for t.

6t^2 - 42t = 0

6t(t - 7) = 0

t = 0 or t - 7 = 0

t = 0 or t = 7

The height is zero at time zero and and time 7 seconds.

Answer is C.

Consider the graph of the linear function h(x) = –6 + x. Which quadrant will the graph not go through and why? Quadrant I, because the slope is negative and the y-intercept is positive Quadrant II, because the slope is positive and the y-intercept is negative Quadrant III, because the slope is negative and the y-intercept is positive Quadrant IV, because the slope is positive and the y-intercept is negative

Answers

You'd benefit from graphing h(x) = –6 + x.  To do this, obtain the slope and y-intercept of this straight line from h(x) = –6 + x:

Slope is +1 = 1/1 = rise / run

y-intercept is -6, that is, (0,-6)

To graph this, plot the point (0,-6).  Starting at this point, go 1 unit to the right, to (1,-6), and then from (1,-6) go 1 unit up, to (1,-5).  Draw a line thru (0,-6) and (1,-5).  You will see that this line is BELOW the origin; it never enters Quadrant II.

The line of linear function h(x) = –6 + x is not going to enter in the second quadrant so option second will be correct.

What is a graph?

The link between lines and points is described by a graph, which is a diagrammatic representation of a network.

A graph is made up of some points and the distance between two. It doesn't matter how much time the lines are or where the points are located. A node is a name for each constituent in a graph.

Given equation is h(x) = –6 + x

at x = 0 , h(x) = -6 so ( 0 , -6 ) is first point.

at x =1 , h(x) = -5 so ( 1 , -5 ) is second point.

If we draw a line by the two-point which I have attached then you can see it not going to the second quarter.

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Mr. Green's sunflower grew 29 centimeters in one week. The next week it grew 5 centimeters more than the previous week. What is the total number of centimeters the sunflower grew in 2 weeks?

Answers

1 week=29
2 week=5
29+5=34
It grew 29 centimeters the first week and then 34 in the following week (29+5), and then when you add the two together, you get an answer of 63 centimeters.

Choose the value of X that makes the open sentence true

30 - x^2 < 3x + 7

A 4
B 3
C 2
D 1

Answers

a 30- 16=14       3*4+7=19  14<19 correct
b 30-9=21          3*3+7=16  21>16  incorrect
c 30-4=26          3*2+7=13   26>13 incorrect
d 30-1=29          3*1+7=10   29>10 incorrect

the answer is a

Answer:

Option A - 4

Step-by-step explanation:

Given : Inequality [tex]30 - x^2 < 3x + 7[/tex]

To find : Choose the value of x that makes the open sentence true  ?

Solution :

We substitute the value of x from options to check which is true,

A) x=4

[tex]30 - 4^2 < 3(4) + 7[/tex]

[tex]30-16 < 12+ 7[/tex]

[tex]14< 19[/tex]

It is true.

B) x=3

[tex]30 - 3^2 < 3(3) + 7[/tex]

[tex]30-9< 9+ 7[/tex]

[tex]21< 16[/tex]

It is false.

C) x=2

[tex]30 - 2^2 < 3(2) + 7[/tex]

[tex]30-4<6+ 7[/tex]

[tex]26< 13[/tex]

It is false.

D) x=1

[tex]30 - 1^2 < 3(1) + 7[/tex]

[tex]30-1<3+ 7[/tex]

[tex]29< 10[/tex]

It is false.

Therefore, Option A is correct.

6.41* 10^3 in standard form

Answers

6410 is the answer because you move the decimal place 3 times

0.5,3/16,0.755/49 least to greatest

Answers

0.5 is least greatest
5/49, 3/16, 0.5, 0.75
least to greatest 

Choose all of the following that must be true for a random experiment to be binomial.
Select one or more:

A. On each trial, the event of interest either occurs or does not occur.
B. The trials are independent of one another and repeated under identical conditions.
C. The probability of occurrence is the same on each trial.
D. There is a fixed number of trials.

Answers

A. On each trial, the event of interest either occurs or does not occur. RIGHT

B. The trials are independent of one another and repeated under identical conditions. WRONG. 

C. The probability of occurrence is the same on each trial. WRONG

D. There is a fixed number of trials. RIGHT
Final answer:

A binomial experiment has a fixed number of trials, all are independent and conducted under identical conditions. Only two results—success or failure—are possible with each trial, each having the same probability, fitting a binomial probability distribution.

Explanation:

For a random experiment to be binomial, it must meet certain conditions. Firstly, there should be a fixed number of trials, denoted as 'n'. The results of these trials don't influence each other, meaning that the trials are independent. This signifies that the outcome of a trial, for example, the first one, does not affect the outcomes of the subsequent trials. Moreover, all these trials should be conducted under identical conditions.

In a binomial experiment, there are only two possible results, often referred to as 'success' and 'failure'. Each trial has the same probability of success, denoted as 'p'. The outcomes of a binomial experiment fit a binomial probability distribution. The random variable 'X' stands for the number of successful trials. The mean 'µ' is given by 'np', and the standard deviation 'o' by √npq. The probability of exactly 'x' successes in 'n' trials is P(X = x).

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if you are told only that you scored 80th percentile do you know from the description exactly how it wad calculated? Explain

Answers

We know that there is no universal acceptance meaning of a percentile. When someone told you that you are in the 80th percentile, the meaning of that is you have achieved the lowest score that is greater than 80 percent of the score. It is calculated by using the formula     R = P/100 x (N + 1)

Final answer:

The 80th percentile represents the score below which 80% of the scores fall.

Explanation:

The 80th percentile represents the score below which 80% of the scores fall. It is calculated by finding the value at which 80% of the data is below and 20% is above. For example, if you scored in the 80th percentile on a 60-point assignment, it means that 80% of students scored equal to or below 49 points and 20% scored above.

The height of a grain of a cylindrical silo is is increasing at a constant rate of 4 feet per minute At what rate is the volume of grain in the cylinder if the radius of the silo is 10 feet?

Answers

Volume of cylinder
[tex]V = \pi h r^2 [/tex]

radius is given as 10
[tex]V = \pi h (10)^2 = 100\pi h[/tex]

Differentiate with respect to 't'
[tex]\frac{dV}{dt} = 100 \pi \frac{dh}{dt} [/tex]

dh/dt = 4

[tex]\frac{dV}{dt} = 100 \pi (4) = 400 \pi[/tex]

Answer:

The rate of change of the volume of the cylinder when the radius is 10 ft is

[tex]\frac{dV}{dt}=400\pi \:{\frac{ft^3}{min} }[/tex]

Step-by-step explanation:

This is a related rates problem. A related rates problem is a problem in which we know the rate of change of one of the quantities (the height of a grain) and want to find the rate of change of the other quantity (the volume of grain in the cylinder).

The volume of a cylinder is given by

[tex]V=\pi r^2 h[/tex]

V and h both vary with time so you can differentiate both sides with respect to time, t, to get

[tex]\frac{dV}{dt}=\pi r^2 \frac{dh}{dt}[/tex]

Now use the fact that [tex]\frac{dh}{dt} = 4 \:{\frac{ft}{min} }[/tex] and [tex]r = 10 \:ft[/tex]

[tex]\frac{dV}{dt}=\pi (10)^2 \cdot 4\\\\\frac{dV}{dt}=100\cdot \:4\pi \\\\\frac{dV}{dt}=400\pi[/tex]


The sum of two numbers is equal to 70. Which of the following functions can be use to find the product of the two numbers if one of the numbers is x?

a) p = x^2

b) p = x (x-70)

c) p = x (70 - x)

d) p = (x - 70)^2

Answers

Let x=number 1 let y=number2
there sum is equal to 70
then

number1+number2=70

substituting

x+y=70

y=70-x
let there product will be p
p=xy
substituting
p=x(70-x)
which is choice c

How do you multiply -5 that has an exponent of 4 but no parenthesis with 4? Please explain

Answers

a negative sign in front of any expression, is in effect a factor of -1, so -7 for example is really the same as saying -1 * 7, because the -1 is multiplying it right in front of it, therefore

[tex]\bf -5^4\implies -1\cdot 5^4\implies -1\cdot 625\implies -625 \\\\\\ \textit{as opposed to }(-5)^4\implies (-1\cdot 5)^4\implies (-1)^4\cdot 5^4 \\\\\\ (-1\cdot -1\cdot -1\cdot -1)(5\cdot 5\cdot 5\cdot 5)\implies 1\cdot 625\implies 625[/tex]
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