Question: Suppose that the oxygen level P (for purity) in a body of water t months after an oil spill is given by (a) Find how

Suppose that the oxygen level P (for purity) in a body of water t months after an oil spill is given by

(a) Find how long it will be before the oxygen level reaches its minimum.
(b) Find how long it will be before the rate of change of P is maximized. That is, find the point of diminishing returns.

16 4 1 t+ 4 P(t) = 500 (t + 4)?

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