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

A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 60 cm /s.
(a) Express the radius of this circle as a function of the time (in seconds).
(b) If A is the area of this circle as a function of the radius, find A o r and interpret it.

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