If algae grows at a rate that can be modeled by the exponential...

If algae grows at a rate that can be modeled by the exponential function A(t) = ae^rt, what is the surface area of algae on a pond if the initial area of the algae is 2 square meters, the growth rate is 10%, and the algae grows for three days? (Use 2.718 for the value of e.)