Question: The figure shows the oxygen level P (for purity) in a lake t months after an oil spill. (a) Which of A, B, and C

The figure shows the oxygen level P (for purity) in a lake t months after an oil spill.

(a) Which of A, B, and C is the point of inflection for the graph?
(b) On which side of C is d2 P/ dt2 Ë‚ 0?
(c) Does the rate of change of purity attain its maximum at C?

A C, en level

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