Question: A spherical balloon is being inflated. Find the rate of increase of the surface area (S = 4r2) with respect to the radius r when

A spherical balloon is being inflated. Find the rate of increase of the surface area (S = 4πr2) with respect to the radius r when is
(a) 1 ft,
(b) 2 ft,
(c) 3 ft. What conclusion can you make?

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