Mathematics, 15.02.2021 06:20 noeminm105

A ball is thrown vertically upward from the roof of a school that is 23m high. The equation which is given its height above the gorund, in meters, after t seconds is h(t)=-4.9t^2+18t+23, t>=0 a) determine the average rate of change of the height of the ball between 1s and 2s
B) determine the instantaneous rate of change of the height of the ball at 2 s.

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