05:15
Precalculus: Graphical, Numerical, Algebraic
Spread of FIu The number of students infected with flu at Springfield High School after $t$ days is modeled by the function
$$
P(t)=\frac{800}{1+49 e^{-0.2 t}}
$$
(a) What was the initial number of infected students?
(b) When will the number of infected students be 200$?$
(e) The school will close when 300 of the 800 -student body
are infected. When will the school close?