Find the Exponential Function That Satisfies the Given Conditions $= 7 \mathrm {~g}$

Find the exponential function that satisfies the given conditions.
-Initial mass $= 7 \mathrm {~g}$ , decreasing at a rate of $3.7 \%$ per day

A) $m ( t ) = 7 \cdot 1.37 t$
B) $\mathrm { m } ( \mathrm { t } ) = 3.7 \cdot 0.93 ^ { \mathrm { t } }$
C) $\mathrm { m } ( \mathrm { t } ) = 7 \cdot 0.963 ^ { \mathrm { t } }$
D) $\mathrm { m } ( \mathrm { t } ) = 7 \cdot 1.037 ^ { \mathrm { t } }$