Write an equation that describes the radius of the circle as a function of time, t. Call the function r(t).

Question

The radius of the circle is increasing at the rate of 6.25 feet per second.

Answer 1

r'(t)= 6.25

r(t) = integral of 6.25

r (t)= 6.25t + c where c= constant = the ro = the radius at time t =0