A circular oil slick is expanding with radius, r in feet, at time t in hours given by r = 12t - 0.3t^2, for t in hours, 0

Question

A circular oil slick is expanding with radius, r in feet, at time t in hours given by r = 12t - 0.3t^2, for t in hours, 0 ≤ t ≤ 10.
Find a formula for A = f(t), the area of the oil slick as a function of time.
The formula for the area of a circle is A = πr²
A = f(t) = 
Be sure to include units!

Kunduz · Accepted Answer

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