Answer:
800 fish per day is the initial growth rate of the fish population
Explanation:
The growth rate is the derivative of the population function with respect to time (t). Therefore, we need to calculate the derivative of P(t) and evaluate it at t=0:
![(d\,P(t))/(dt) =800-2\,t\\](https://img.qammunity.org/2021/formulas/mathematics/college/18flikwry2m2s2vq20qm7vwxju3meob84v.png)
which evaluated at t = 0 becomes:
![800-2\,(0)=800](https://img.qammunity.org/2021/formulas/mathematics/college/mv7pandi60k00pifddq2b4wi7ng7qhpvvt.png)