Write the Word or Phrase That Best Completes Each Statement $\mathrm { N }$

Multiple Choice

Write the word or phrase that best completes each statement or answers the question.
-In a town whose population is 3500 , a disease creates an epidemic. The number $\mathrm { N }$ of people infected $t$ days after the disease has begun is given by the function $N ( t ) = \frac { 3500 } { 1 + 15.6 \cdot e ^ { - 0.7 t } }$ . Find the number infected after 8 days.

A) 3311
B) 3309
C) 3307
D) 3312