What is the rate of change of the area of a circle with respect to the radius when the radius is r equals 4 in.r=4 in.?

1 answer:

4 0

S=pi*r^2
dS/dr=2*pi*r=2*pi*4 in. = 8*pi in.

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What is the rate of change of the area of a circle with respect to the radius when the radius is r equals 4 in.r=4 in.​?