Question

When first observed, an oil spill covers 4 square miles. Measurements show that the area is tripling every 8 hrs. Find an exponential model for the area A (in mi2) of the oil spill as a function of time t (in hr) from the beginning of the spill.

A(t) =

Answer 1

Answer: A(t) = 4 x 2 ^ (t/8)

Explanation: Since the area will double every 8 hours, we need to multiply by 2 every time 8 hours passes.