A stone is dropped into a pond causing a circular ripple in the water. Find the rate of change of the area $A$ of the circle with respect to the radius when $r= 3.5$ ft.

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The Answer of A stone is dropped into a pond causing a circular ripple in the water. Find the rate of change of the area $A$ of the circle with respect to the radius when $r= 3.5$ ft.

A Stone Is Dropped into a Pond Causing a Circular AAA

A Stone Is Dropped into a Pond Causing a Circular $A$