Will give brainliest at the right answer ​

Write an explicit formula that represents the sequence defined by the following recursive formula:

At a sand and gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 16 cubic feet per minute. the diameter of the base of the cone is approximately three times the altitude. at what rate is the height of the pile changing when the pile is 12 feet high? (hint: the formula for the volume of a cone is v = 1 3 πr2h.)

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why