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Biologists discovered an invasive species of fish in a lake. The function fff models the population size (in thousands of fish) for this species as a function of time (in months) after being discovered.
Plot the point on the graph of fff that corresponds to the time when the population reached its maximum size.

Answer :

Answer: (4,9) which is the vertex or the top of the parabola

Step-by-step explanation:

The population drops after 4 months making that the maximum of the population of the fish. The answer is the vertex of the parabol which is basically the top of the peak

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