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QUESTION
a pebble is dropped into a still pond, causing ripples in the form of concentrate circles. The radius r of the outer circle is increasing at a rate...
a pebble is dropped into a still pond, causing ripples in the form of concentrate circles. The radius r of the outer circle is increasing at a rate of 25 cm/s. When the radius is 100 cm, at what rate is the total area of the diturbed water increasing?
