Botany—Plant Species: A biologist has shown that the number of plant species in the South...

Botany—Plant Species: A biologist has shown that the number of plant species in the South American rain forest is related to the area of the land studied via the model

where x represents the area studied in square miles, and f(x) represents the number of plant species.

(a) Evaluate f(300) and interpret.

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(b) Find the slope of the secant line for x = 1728 and Δx = 469 and interpret.