A Sample of 400 Grams of Radioactive Substance Decays According $\mathrm { A } ( \mathrm { t } ) = 400 \mathrm { e } ^ { - .035 \mathrm { t } }$

Multiple Choice

A sample of 400 grams of radioactive substance decays according to the function $\mathrm { A } ( \mathrm { t } ) = 400 \mathrm { e } ^ { - .035 \mathrm { t } }$ , where t is the time in years. How much of the substance will be left in the sample after 10 years? Round your answer to the
Nearest whole gram.

A) 0 g
B) 12 g
C) 1 g
D) 282 g