Solve the Problem $\$ 40,000$ Is Invested At $6 \%$ Interest, Compounded Annually

Solve the problem.
-Suppose that $\$ 40,000$ is invested at $6 \%$ interest, compounded annually. Find a function A for the amount in the account after $t$ years.

A) $\mathrm { A } ( \mathrm { t } ) = \$ 40,000 ^ { 0.06 \mathrm { t } }$
B) $\mathrm { A } ( \mathrm { t } ) = \$ 40,000 ( 1.06 ) ^ { \mathrm { t } }$
C) $\mathrm { A } ( \mathrm { t } ) = \$ 40,000 ^ { 1.06 t }$
D) $\mathrm { A } ( \mathrm { t } ) = \$ 40,000 ( 0.06 ) ^ { t }$