The surface area, S, of a sphere of radius r feet is S = S(r) = 4πr2. Find the instantaneous rate of change of the surface area
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Answer:
Step-by-step explanation:
you have a special triangle 30-60-90
the ration in this traingle is x, x , 2x, where 2x is the hypothenuse
the hypothenuse is 12
x=12/2=6
the other leg is 6=10.39