Solve the Problem $\mathrm { f } ( \mathrm { t } ) = \frac { 320 } { 1 + 4.3 \mathrm { e } ^ { - 0.21 \mathrm { t } } }$

Multiple Choice

Solve the problem.
-The logistic growth function $\mathrm { f } ( \mathrm { t } ) = \frac { 320 } { 1 + 4.3 \mathrm { e } ^ { - 0.21 \mathrm { t } } }$ describes the population of a species of butterflies t months after they are introduced to a non-threatening habitat. How many butterflies were initially introduced to the habitat?

A) 60 butterflies
B) 320 butterflies
C) 4 butterflies
D) 2 butterflies