Chapter 8 - Section 8.1 - Solving Quadratic Equations by Completing the Square - Exercise Set - Page 485: 77

4%

A=P(1+r)2 A=16224 p=15000 t=2 16224=15000(1+r)$^{2}$ (1+r)$^{2}$=$\frac{16224}{15000}$ 1+r=±$\sqrt{\frac{16224}{15000}}$ 1+r=±1.04 r=-1±1.04 r=-2.04 or r=0.04 since the negative result does not make sense then the real solution is 0.04 which is 4%