How long before the ball hits the ground

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Reference no: EM131175966

A ball is thrown vertically upward from the ledge of a building 75 feet above ground. The ball s height h in feet above the ground at time t in seconds is given by the equation

(a) how long does it take the ball to reach a height of 90 feet?

(b) How long before the ball is back to its original position (at 75 feet)?

Reference no: EM131175966

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