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) = 151}: + 2, nd the area of the ripple as a function of time. Find the area of the ripple at t : 2. Enter the exact answer. For the number 7r, you can either type pi or you can click the button with r on it. Do not enter any commas in your answer. A: gain