For time t between 2 and 3 hours the radius of circle c is 5t-t^2-6 feet. at time t=2.6 hours the area of the circle is changing at a rate of ------. at time 2.6 hours the area of the circle is-----.
a(t) = pie(5t-t^2-6)squared
This shows how to find the rate of change of the area of a circle and the area of a circle at a given point in time.