## Precalculus (6th Edition) Blitzer

Model: $A=A_{0}e^{kt}$ $t=0$ for the year $2010.$ Unknown: $A$, when $A_{0}=16, t=5715,k=-0.000121t$ $A=A_{0}e^{kt}=16e^{-0.000121\cdot 5715}\approx 8.013$