Mathematics, 16.04.2020 00:21 Perdikaris
A spherical party balloon is being inflated with helium pumped in at a rate of 10 cubic feet per minute. How fast is the radius growing at the instant when the radius has reached 1 ft? HINT [See Example 1.] (The volume of a sphere of radius r is V = 4/3 πr3. Round your answer to two decimal places.)
Answers: 3
ft per minute. 
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A spherical party balloon is being inflated with helium pumped in at a rate of 10 cubic feet per min...
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