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Identifying Variables in Related Rates

Authored by Maureen Stinnett

Mathematics

11th Grade

Used 8+ times

Identifying Variables in Related Rates
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14 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Use the following scenario to answer the question:

Water leaking onto a floor forms a circular pool. The radius of the pool increases at a rate of 4 cm/min. How fast is the area of the pool increasing when the radius is 5 cm?

Question: What formula should we use?

A = 4π r2A\ =\ 4\pi\ r^2

A=π r2A=\pi\ r^2

C=2π rC=2\pi\ r

V=43π r3V=\frac{4}{3}\pi\ r^3

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Use the following scenario to answer the question:

Water leaking onto a floor forms a circular pool. The radius of the pool increases at a rate of 4 cm/min. How fast is the area of the pool increasing when the radius is 5 cm?

Question: What does 4 represent?

dr/dt

dA/dt

r

A

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Use the following scenario to answer the question:

Water leaking onto a floor forms a circular pool. The radius of the pool increases at a rate of 4 cm/min. How fast is the area of the pool increasing when the radius is 5 cm?

Question: What does 5 represent?

dr/dt

dA/dt

r

A

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Use the following scenario to answer the question:

Water leaking onto a floor forms a circular pool. The radius of the pool increases at a rate of 4 cm/min. How fast is the area of the pool increasing when the radius is 5 cm?

Question: What is the scenario asking you to find?

dr/dt

dA/dt

r

A

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Use the following scenario to answer the question:

A conical paper cup is being filled with water such that the water level rises at a rate of 2 cm/sec. The radius increases at a rate of 0.5 cm/sec as the water level rises. At what rate is the water being poured into the cup when the water level is 8cm and the radius is 4cm?

Question: What formula should we use?

SA=π r2+π rlSA=\pi\ r^2+\pi\ rl

LA = π rlLA\ =\ \pi\ rl

V=13π r2hV=\frac{1}{3}\pi\ r^2h

V=13BhV=\frac{1}{3}Bh

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Use the following scenario to answer the question:

A conical paper cup is being filled with water such that the water level rises at a rate of 2 cm/sec. The radius increases at a rate of 0.5 cm/sec as the water level rises. At what rate is the water being poured into the cup when the water level is 8cm and the radius is 4cm?

Question: What does the 2 represent?

dV/dt

h

dr/dt

dh/dt

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Use the following scenario to answer the question:

A conical paper cup is being filled with water such that the water level rises at a rate of 2 cm/sec. The radius increases at a rate of 0.5 cm/sec as the water level rises. At what rate is the water being poured into the cup when the water level is 8cm and the radius is 4cm?

Question: What does the 8 represent?

dr/dt

r

h

dh/dt

V

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