$8710.00 is invested for 19 years using simple interest. If the future value is $12019.80, what is the intrest rate. Round you answer to the nearest tenth of a percent. $LaTeX: \displaystyle </p>$

Using $LaTeX: \displaystyle FV = PV +PVrt \iff FV - PV = PVrt \iff r = \frac{FV - PV}{PVt}$ . Evaluating gives $LaTeX: \displaystyle r = \frac{12019.8-8710 }{(8710)(19) } = 0.020 = 2.0%$