The amount of deer has to be calculated by this equation:
[tex]A=P(1+r)^y[/tex]Where P is the population of deers, r is the growth percentage, and y is the number of years.
[tex]A_{1year}=50(1+0.9)^1=95\text{ deers.}[/tex][tex]A_{2years}=50(1+0.9)^2=180.5\text{ deers.}[/tex]