Deck 3: Section 7: Differentiation
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Deck 3: Section 7: Differentiation
1
A point is moving along the graph of the function
such that
centimeters per second. Find
when x =
.
A)
B)
C)
D)
E)




A)

B)

C)

D)

E)


2
A man 6 feet tall walks at a rate of
feet per second away from a light that is 15 feet above the ground (see figure). When he is
feet from the base of the light, at what rate is the tip of his shadow moving? 
A)
ft/sec
B)
ft/sec
C)
ft/sec
D)
ft/sec
E)
ft/sec



A)

B)

C)

D)

E)


3
A ladder
feet long is leaning against the wall of a house (see figure). The base of the ladder is pulled away from the wall at a rate of
feet per second. Find the rate at which the angle between the ladder and the wall of the house is changing when the base of the ladder is
feet from the wall. Round your answer to three decimal places. 
A)
rad/sec
B)
rad/sec
C)
rad/sec
D)
rad/sec
E)
rad/sec




A)

B)

C)

D)

E)


4
Find the rate of change of the distance
between the origin and a moving point on the graph of
if
centimeters per second.
A)
B)
C)
D)
E)



A)

B)

C)

D)

E)

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5
A conical tank (with vertex down) is
feet across the top and
feet deep. If water is flowing into the tank at a rate of
cubic feet per minute, find the rate of change of the depth of the water when the water is
feet deep.
A)
B)
C)
D)
E)




A)

B)

C)

D)

E)

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6
All edges of a cube are expanding at a rate of
centimeters per second. How fast is the volume changing when each edge is
centimeters?
A)
B)
C)
D)
E)


A)

B)

C)

D)

E)

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7
Assume that x and y are both differentiable functions of t. Find
for the equation
.
A)
B)
C)
D)
E)


A)

B)

C)

D)

E)

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8
An airplane is flying in still air with an airspeed of
miles per hour. If it is climbing at an angle of
, find the rate at which it is gaining altitude. Round your answer to four decimal places.
A)
B)
C)
D)
E)


A)

B)

C)

D)

E)

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9
Assume that x and y are both differentiable functions of t . Find
for the equation
.
A)
B)
C)
D)
E)


A)

B)

C)

D)

E)

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10
A ladder
feet long is leaning against the wall of a house (see figure). The base of the ladder is pulled away from the wall at a rate of
feet per second. How fast is the top of the ladder moving down the wall when its base is
feet from the wall? Round your answer to two decimal places. 
A)
ft/sec
B)
ft/sec
C)
ft/sec
D)
ft/sec
E)
ft/sec




A)

B)

C)

D)

E)

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11
The radius, r, of a circle is decreasing at a rate of
centimeters per minute. Find the rate of change of area, A, when the radius is
.
A)
sq cm/min
B)
sq cm/min
C)
sq cm/min
D)
sq cm/min
E)
sq cm/min


A)

B)

C)

D)

E)

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12
The radius r of a sphere is increasing at a rate of
inches per minute. Find the rate of change of the volume when r =
inches.
A)
B)
C)
D)
E)


A)

B)

C)

D)

E)

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13
A point is moving along the graph of the function
such that
=
centimeters per second. Find
when
.
A)
B)
C)
D)
E)





A)

B)

C)

D)

E)

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14
A ladder
feet long is leaning against the wall of a house (see figure). The base of the ladder is pulled away from the wall at a rate of
feet per second. Consider the triangle formed by the side of the house, the ladder, and the ground. Find the rate at which the area of the triangle is changed when the base of the ladder is
feet from the wall. Round your answer to two decimal places. 
A)
B)
C)
D)
E)




A)

B)

C)

D)

E)

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15
A man 6 feet tall walks at a rate of
feet per second away from a light that is 15 feet above the ground (see figure). When he is
feet from the base of the light, at what rate is the length of his shadow changing? 
A)
ft/sec
B)
ft/sec
C)
ft/sec
D)
ft/sec
E)
ft/sec



A)

B)

C)

D)

E)

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16
A spherical balloon is inflated with gas at the rate of
cubic centimeters per minute. How fast is the radius of the balloon increasing at the instant the radius is
centimeters?
A)
B)
C)
D)
E)


A)

B)

C)

D)

E)

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