A rock released fromrest to fall on a small airless planet falls y = gt 2 m in t sec, g aconstant. Suppose that the rock falls to the bottom of a crevasse20 m below and reaches the bottom in 4 sec. (a) Find the value of g. (b) Find the average speed for the fall. (c) With what speed did the rock hit the bottom?

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Exponential Growth Model

The relation that represents an exponential function is: