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Polynomial -- word problem.

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If a ball is thrown downwards from a height of 128 feet with an initial velocity of 32 feet per second and its height above the ground is given by the formula S = - 16t2 - 32 t + 128. How long will it take the ball to reach the ground?

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If a ball is thrown downwards from a height of 128 feet with an initial velocity of 32 feet per second and its height above the ground is given by the formula S = - 16t2 - 32 t + 128. How long ...

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