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A ball is dropped off the side of a cliff. The height of the ball can be measured by h(t) = -4.8t^2+100 where h is the height of the ball

off the water in meters and t is the time after the ball is dropped in seconds. What is the average speed of the ball before it hits the water? (include units) What is the speed of the ball when it is dropped? (include units) How do you know? What is the speed of the ball when it hits the water? (Show all work)

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