Question 1186788
The radius r of a sphere is increasing at a rate of 8 inches per minute.

(a)  Find the rate of change of the volume when r = 10 inches.
V = 4pi*r^3/3
dV/dt = {{{4pi*r^2*(dr/dt) = 4pi*100*8 = 3200pi}}}cu inches/minute.
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(b)  Find the rate of change of the volume when r = 38 inches.
Same problem, different numbers.