A stone is dropped into a lake, creating a circular ripple that travels outward at a
Chapter 1, Problem 57(choose chapter or problem)
A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of . (a) Express the radius of this circle as a function of the time (in seconds). (b) If is the area of this circle as a function of the radius, find and interpret it.
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