Question: A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 60 cmys. (a) Express the radius r

A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 60 cmys.

(a) Express the radius r of this circle as a function of the time t (in seconds).

(b) If A is the area of this circle as a function of the radius, find A 8 r and interpret it.

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