a spherical balloon is being inflated. find the rate of increase of the surface area (S=4 pie r squared) with respect to radius r when r is (A) 1 ft, (B) 2 ft, (C) 3ft.(adsbygoogle = window.adsbygoogle || []).push({});

Here's what i did

i found the derivative of s and i put 4 2R and then i plugged in the numbers in R

and i got 8 ft sq/ft 16 ft sq/ft and 24 ft sq/ft

except i'm not sure if im doing it right, although those are the right answers i didnt get the units along with them

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# Homework Help: Rate of increase of the surface area

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