Calculus 1 : Calculus

Study concepts, example questions & explanations for Calculus 1

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Example Questions

Example Question #2671 : Functions

A cube is growing in size. What is the rate of growth of the cube's surface area if its sides have a length of 11 and a rate of growth of 30?

Possible Answers:

\(\displaystyle 3630\)

\(\displaystyle 330\)

\(\displaystyle 3960\)

\(\displaystyle 220\)

\(\displaystyle 660\)

Correct answer:

\(\displaystyle 3960\)

Explanation:

Begin by writing the equations for a cube's dimensions. Namely its surface area in terms of the length of its sides:

\(\displaystyle A=6s^2\)

The rates of change of the surface area can be found by taking the derivative of each side of the equation with respect to time:

\(\displaystyle \frac{dA}{dt}=12s\frac{ds}{dt}\)

Now, with the rate equation known, we can solve for the rate of change of the surface area with what we know about the cube, namely that its sides have a length of 11 and a rate of growth of 30:

\(\displaystyle \frac{dA}{dt}=12(11)(30)=3960\)

Example Question #789 : How To Find Rate Of Change

A cube is growing in size. What is the rate of growth of the cube's surface area if its sides have a length of 10 and a rate of growth of 31?

Possible Answers:

\(\displaystyle 576600\)

\(\displaystyle 96100\)

\(\displaystyle 1860\)

\(\displaystyle 18600\)

\(\displaystyle 3720\)

Correct answer:

\(\displaystyle 3720\)

Explanation:

Begin by writing the equations for a cube's dimensions. Namely its surface area in terms of the length of its sides:

\(\displaystyle A=6s^2\)

The rates of change of the surface area can be found by taking the derivative of each side of the equation with respect to time:

\(\displaystyle \frac{dA}{dt}=12s\frac{ds}{dt}\)

Now, with the rate equation known, we can solve for the rate of change of the surface area with what we know about the cube, namely that its sides have a length of 10 and a rate of growth of 31:

\(\displaystyle \frac{dA}{dt}=12(10)(31)=3720\)

Example Question #782 : How To Find Rate Of Change

A cube is growing in size. What is the rate of growth of the cube's surface area if its sides have a length of 9 and a rate of growth of 32?

Possible Answers:

\(\displaystyle 6912\)

\(\displaystyle 576\)

\(\displaystyle 1728\)

\(\displaystyle 2304\)

\(\displaystyle 3456\)

Correct answer:

\(\displaystyle 3456\)

Explanation:

Begin by writing the equations for a cube's dimensions. Namely its surface area in terms of the length of its sides:

\(\displaystyle A=6s^2\)

The rates of change of the surface area can be found by taking the derivative of each side of the equation with respect to time:

\(\displaystyle \frac{dA}{dt}=12s\frac{ds}{dt}\)

Now, with the rate equation known, we can solve for the rate of change of the surface area with what we know about the cube, namely that its sides have a length of 9 and a rate of growth of 32:

\(\displaystyle \frac{dA}{dt}=12(9)(32)=3456\)

Example Question #3701 : Calculus

A cube is growing in size. What is the rate of growth of the cube's surface area if its sides have a length of 8 and a rate of growth of 33?

Possible Answers:

\(\displaystyle 69696\)

\(\displaystyle 1264\)

\(\displaystyle 2112\)

\(\displaystyle 528\)

\(\displaystyle 3168\)

Correct answer:

\(\displaystyle 3168\)

Explanation:

Begin by writing the equations for a cube's dimensions. Namely its surface area in terms of the length of its sides:

\(\displaystyle A=6s^2\)

The rates of change of the surface area can be found by taking the derivative of each side of the equation with respect to time:

\(\displaystyle \frac{dA}{dt}=12s\frac{ds}{dt}\)

Now, with the rate equation known, we can solve for the rate of change of the surface area with what we know about the cube, namely that its sides have a length of 8 and a rate of growth of 33:

\(\displaystyle \frac{dA}{dt}=12(8)(33)=3168\)

Example Question #792 : Rate Of Change

A cube is growing in size. What is the rate of growth of the cube's surface area if its sides have a length of 7 and a rate of growth of 34?

Possible Answers:

\(\displaystyle 2856\)

\(\displaystyle 679728\)

\(\displaystyle 56644\)

\(\displaystyle 97104\)

\(\displaystyle 1666\)

Correct answer:

\(\displaystyle 2856\)

Explanation:

Begin by writing the equations for a cube's dimensions. Namely its surface area in terms of the length of its sides:

\(\displaystyle A=6s^2\)

The rate of change of the surface area can be found by taking the derivative of each side of the equation with respect to time:

\(\displaystyle \frac{dA}{dt}=12s\frac{ds}{dt}\)

Now that we have a relationship between the surface area and the side parameters, we can use what we were told about the cube, in particular that its sides have a length of 7 and a rate of growth of 34:

\(\displaystyle \frac{dA}{dt}=12(7)(34)=2856\)

Example Question #2671 : Functions

A cube is growing in size. What is the rate of growth of the cube's surface area if its sides have a length of 6 and a rate of growth of 35?

Possible Answers:

\(\displaystyle 2520\)

\(\displaystyle 22050\)

\(\displaystyle 7350\)

\(\displaystyle 1260\)

\(\displaystyle 44100\)

Correct answer:

\(\displaystyle 2520\)

Explanation:

Begin by writing the equations for a cube's dimensions. Namely its surface area in terms of the length of its sides:

\(\displaystyle A=6s^2\)

The rate of change of the surface area can be found by taking the derivative of each side of the equation with respect to time:

\(\displaystyle \frac{dA}{dt}=12s\frac{ds}{dt}\)

Now that we have a relationship between the surface area and the side parameters, we can use what we were told about the cube, in particular that its sides have a length of 6 and a rate of growth of 35:

\(\displaystyle \frac{dA}{dt}=12(6)(35)=2520\)

Example Question #794 : Rate Of Change

A cube is growing in size. What is the rate of growth of the cube's surface area if its sides have a length of 5 and a rate of growth of 36?

Possible Answers:

\(\displaystyle 10800\)

\(\displaystyle 5400\)

\(\displaystyle 2160\)

\(\displaystyle 180\)

\(\displaystyle 900\)

Correct answer:

\(\displaystyle 2160\)

Explanation:

Begin by writing the equations for a cube's dimensions. Namely its surface area in terms of the length of its sides:

\(\displaystyle A=6s^2\)

The rate of change of the surface area can be found by taking the derivative of each side of the equation with respect to time:

\(\displaystyle \frac{dA}{dt}=12s\frac{ds}{dt}\)

Now that we have a relationship between the surface area and the side parameters, we can use what we were told about the cube, in particular that its sides have a length of 5 and a rate of growth of 36:

\(\displaystyle \frac{dA}{dt}=12(5)(36)=2160\)

Example Question #791 : Rate Of Change

A cube is growing in size. What is the rate of growth of the cube's surface area if its sides have a length of 4 and a rate of growth of 37?

Possible Answers:

\(\displaystyle 296\)

\(\displaystyle 1776\)

\(\displaystyle 14208\)

\(\displaystyle 592\)

\(\displaystyle 1184\)

Correct answer:

\(\displaystyle 1776\)

Explanation:

Begin by writing the equations for a cube's dimensions. Namely its surface area in terms of the length of its sides:

\(\displaystyle A=6s^2\)

The rate of change of the surface area can be found by taking the derivative of each side of the equation with respect to time:

\(\displaystyle \frac{dA}{dt}=12s\frac{ds}{dt}\)

Now that we have a relationship between the surface area and the side parameters, we can use what we were told about the cube, in particular that its sides have a length of 4 and a rate of growth of 37:

\(\displaystyle \frac{dA}{dt}=12(4)(37)=1776\)

Example Question #796 : Rate Of Change

A cube is growing in size. What is the rate of growth of the cube's surface area if its sides have a length of 3 and a rate of growth of 38?

Possible Answers:

\(\displaystyle 684\)

\(\displaystyle 1368\)

\(\displaystyle 4104\)

\(\displaystyle 342\)

\(\displaystyle 2052\)

Correct answer:

\(\displaystyle 1368\)

Explanation:

Begin by writing the equations for a cube's dimensions. Namely its surface area in terms of the length of its sides:

\(\displaystyle A=6s^2\)

The rate of change of the surface area can be found by taking the derivative of each side of the equation with respect to time:

\(\displaystyle \frac{dA}{dt}=12s\frac{ds}{dt}\)

Now that we have a relationship between the surface area and the side parameters, we can use what we were told about the cube, in particular that its sides have a length of 3 and a rate of growth of 38:

\(\displaystyle \frac{dA}{dt}=12(3)(38)=1368\)

Example Question #797 : Rate Of Change

A cube is growing in size. What is the rate of growth of the cube's surface area if its sides have a length of 2 and a rate of growth of 39?

Possible Answers:

\(\displaystyle 26\)

\(\displaystyle 39\)

\(\displaystyle 936\)

\(\displaystyle 312\)

\(\displaystyle 78\)

Correct answer:

\(\displaystyle 936\)

Explanation:

Begin by writing the equations for a cube's dimensions. Namely its surface area in terms of the length of its sides:

\(\displaystyle A=6s^2\)

The rate of change of the surface area can be found by taking the derivative of each side of the equation with respect to time:

\(\displaystyle \frac{dA}{dt}=12s\frac{ds}{dt}\)

Now that we have a relationship between the surface area and the side parameters, we can use what we were told about the cube, in particular that its sides have a length of 2 and a rate of growth of 39:

\(\displaystyle \frac{dA}{dt}=12(2)(39)=936\)

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