Edited question:
Peter's chickens got the bird flu and he is rying to stop the epidemic. He knows that the function
f(t) = 300 / ( 15 - 20e^(-0.07t) )
describes the number of his chickens who are sick t weeks after the initial outbreak.

(a) How many chickens became sick when the flu epidemic has began?

I got -60 for my answer, which doesn't seem right

(b) In how many weeks will 100 chickens be sick?

i got roughly 7.3 weeks

(c) What is the maximum number of chickens that will become ill?

Question

Edited question:
Peter's chickens got the bird flu and he is rying to stop the epidemic. He knows that the function
f(t) = 300 / ( 15 - 20e^(-0.07t) )
describes the number of his chickens who are sick t weeks after the initial outbreak.

(a) How many chickens became sick when the flu epidemic has began?

I got -60 for my answer, which doesn't seem right

(b) In how many weeks will 100 chickens be sick?

i got roughly 7.3 weeks

(c) What is the maximum number of chickens that will become ill?