$27450.00 dollars is invested at 2.8% using simple interest. If the future value is $35136.00, how long was it invested? Round to the nearest tenth of a year.

Using $LaTeX: \displaystyle FV = PV +PVrt \iff FV - PV = PVrt \iff t = \frac{FV - PV}{PVr}$ . Evaluating gives $LaTeX: \displaystyle t = \frac{35136.0-27450}{(27450)(0.028)} = 10.0$ years