Multiple Choice
The volume of a conical pile of sand is increasing at a rate of ft 3 /min, and the height of the pile always equals the radius r of the base. Express r as a function of time t (in minutes) , assuming that r = 0 when t = 0.
A)
B)
C)
D)
E)
Correct Answer:

Verified
Correct Answer:
Verified
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