A man standing on the edge of a 20 foot tall building throws a ball at a velocity of 15 ft/sec into the air. The function of the ball's height, h (in feet), at t seconds is given. h(t) = -5t² + 15t + 20. How long does it take for the ball to hit the ground in seconds?

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04-11-2022
Mathematics

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A man standing on the edge of a 20 foot tall building throws a ball at a velocity of 15 ft/sec into the air. The function of the ball's height, h (in feet), at t seconds is given. h(t) = -5t² + 15t + 20. How long does it take for the ball to hit the ground in seconds?

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