Hopes this helps if right please mark as brainlist:
Answer: -12x^2 + 15x
The population of the fish is given by P(t) = 750(1 + 0.083)^t; where t is the number of years after 2005.
Here, t = 2050 - 2005 = 45
Population in 2050 = 750(1.083)^45 = 750(36.16) = 27,123
This is called a double equation. If you solve for X, you would get 'any whole number.'