Assume that the radius r of a sphere is expanding at a rate of 30 cm/min. The
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Assume that the radius r of a sphere is expanding at a rate of 30 cm/min. The volume of a sphere is V = 43 πr3 and its surface area is 4πr2. Determine the given rate.
Surface area with respect to time at t = 2 min, assuming that r = 10 at t = 0
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