Multiple Choice
A spherical party balloon is being inflated by helium pumped in at a rate 3 cubic feet per minute. How fast is the radius growing at the instant when the radius has reached 1 foot? The volume of a sphere of radius r is .
A) 0.64 feet per minute
B) 0.72 feet per minute
C) 0.76 feet per minute
D) 0.14 feet per minute
E) 0.24 feet per minute
Correct Answer:

Verified
Correct Answer:
Verified
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