Approximate the Number Using a Calculator $400 \mathrm {~g}$ Of Lead-210 Decays to Polonium-210 According to the Function Given

Multiple Choice

Approximate the number using a calculator. Round your answer to three decimal places.
-A sample of $400 \mathrm {~g}$ of lead-210 decays to polonium-210 according to the function given by $\mathrm { A } ( \mathrm { t } ) = 400 \mathrm { e } ^ { - 0.032 \mathrm { t } }$ , where $\mathrm { t }$ is time in years. What is the amount of the sample after 30 years (to the nearest g) ?

A) $153 \mathrm {~g}$
B) $1045 \mathrm {~g}$
C) $83 \mathrm {~g}$
D) $111 \mathrm {~g}$