## Algebra 1: Common Core (15th Edition)

Use the exponential formula: y=a $\times$ $b^{x}$: A is the initial amount which is 200 B is the growth factor which 1.15(15% every half hours) X is 6 half hours(3 hours) Y is the final amount So plug in the values to get y=200(1.15$)^{x}$.X=6: y=200(1.15$)^{6}$ y=200(2.3) y$\approx$463 people