Sand falls off of a conveyor belt at a rate of 3 in3/sec . If the sand forms a conical pile in which the height of the pile is always equal to twice the radius, at what rate is the height of the pile changing when the volume of the pile is 60 in3 ?

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e) none of the above because the measure of angle cba is 101°

after simplifying it i got: -36.25 as my answer. hope that !

its 60

4 x 12 = 48

3 x 4 = 12

48 + 12 = 60

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