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AP.CALC: CHA‑3 (EU), CHA‑3.E (LO), CHA‑3.E.1 (EK)
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The circumference of a circle is increasing at a rate of start fraction, pi, divided by, 2, end fraction meters per hour.
At a certain instant, the circumference is 12, pi meters.
What is the rate of change of the area of the circle at that instant (in square meters per hour)?
Choose 1 answer: