A stone 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. (a) 1 sec
(b) 3 sec
(c) 6 sec
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rate is speed/time
which is 40m/s power of 2
b)13.33m/s power of 2
c)6.67m/s power of 2
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I typed those answers into my online homework program, which tells you if the answers are right or wrong, and it says all of those are wrong, but it doesn't tell me why.
Then there might be something wrong in the system,meanwhile let me confirm somewhere.
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