SOLUTION: A ball is thrown into a lake, creating a circular ripple whose radius travels outward at a speed of 7 centimeters per second. Define a function f that determines the area of th

Algebra ->  Functions -> SOLUTION: A ball is thrown into a lake, creating a circular ripple whose radius travels outward at a speed of 7 centimeters per second. Define a function f that determines the area of th      Log On


   

Question 994818: A ball is thrown into a lake, creating a circular ripple whose radius travels outward at a speed of 7 centimeters per second.
Define a function f that determines the area of the ripple, A, in square centimeters, in terms of the varying number of seconds that have elapsed since the ball hit the water, t.
Answer by ikleyn(52835) About Me  (Show Source):
You can put this solution on YOUR website!
.
A(t) = pi.%287t%29%5E2,     or

A(t) = 49%2Api.t%5E2,

where  t  is time in seconds that have elapsed since the ball hit the water.