Solve the Problem $f ( t ) = \frac { 12,000 } { 1 + 199 e ^ { - 1.7 t } }$

Multiple Choice

Solve the problem.
-The logistic growth functi $f ( t ) = \frac { 12,000 } { 1 + 199 e ^ { - 1.7 t } }$ models the number of people who have become ill with a particular infection t weeks after its initial outbreak in a particular community. How many people were ill after
9 weeks?

A) 12,000 people
B) 11,999 people
C) 12,200 people
D) 540 people