Answer: 125 trout fish would grow at the rate of 75% in no constrain scenario, the model that predicts the fish after t years is as follows:
[tex]T(t)=125(1.75)^t\rightarrow(1)[/tex]Therefore after 3 years, the population would be, using equation (1):
[tex]\begin{gathered} T(t)=125(1.75)^{t} \\ T(3)=125(1.75)^3 \\ T(3)=125(1.75)(1.75)(1.75) \\ T(3)=669.921875 \\ T(3)\approx670 \end{gathered}[/tex]