Mathematics, 28.09.2019 01:00, jazzwok

Astone is dropped into a lake, creating a circular ripple that travels outward at a speed of 40 cm/s. find the rate at which the area within the circle is increasing after each of the following.
after 1 s = after 3 s = after 7 s =

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Astone is dropped into a lake, creating a circular ripple that travels outward at a speed of 40 cm/s...