Find the Exponential Function That Satisfies the Given Conditions $= 1013$

Multiple Choice

Find the exponential function that satisfies the given conditions.
-Initial population $= 1013$ , doubling every 6 hours

A) $\mathrm { P } ( \mathrm { t } ) = 6 \cdot 2 ^ { \mathrm { t } }$
B) $P ( t ) = 1013 \cdot 2 ^ { t / 6 }$
C) $P ( t ) = 1013 \cdot \left( \frac { 1 } { 2 } \right) ^ { t / 6 }$
D) $P ( t ) = 1013 \cdot 2 ^ { 6 t }$