A rain drop hitting a lake makes a circular ripple. If the radius, in inches, grows as a function of time in minutes according to r (t) = 20/t + 2, find the area of the ripple as a function of time. Find the area of the ripple att = 2. Enter the exact answer. For the number 7, you can either type pi or you can click the button with T on it. Do not enter any commas in your answer.

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Exponential Growth Model

The relation that represents an exponential function is: