An Element Decays at the Rate Of $S(t)=\mathrm{se}^{-0.073 t}$ , Where $s$

Multiple Choice

An element decays at the rate of $S(t) =\mathrm{se}^{-0.073 t}$ , where $s$ is the initial amount in grams and $t$ is the time in years since this initial amount was present. If you have a 39-gram piece of this element, how many grams will you have 5 years from now? Round your answer to the nearest tenth of a gram.

A) $27.1 \mathrm{~g}$
B) $0.7 \mathrm{~g}$
C) $56.2 \mathrm{~g}$
D) $18.1 \mathrm{~g}$