The Number of Students Infected with the Flu on a College

Multiple Choice

The number of students infected with the flu on a college campus after t days is modeled by the function $\mathrm { P } ( \mathrm { t } ) = \frac { 600 } { 1 + 39 \mathrm { e } ^ { - 0.3 \mathrm { t } } }$ What was the initial number of infected students?

A) 30 students
B) 600 students
C) 39 students
D) 15 students