# Math Help - rate of growth question

1. ## rate of growth question

after a particularly harsh winter, the regrowth of a population of rabbits in an area is given by the function $P(t)= \frac{500}{1+e^{-t}}$ where t is time in years. determine the rate of growth in the population after 3 years.

i get 22.5 rabbits/year can anyone verify this?