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Mathematics 11 Online
OpenStudy (anonymous):

A tennis ball is thrown with an initial upward velocity of 8 feet per second. How long will it take for the ball to hit the ground? Use the formula in which the height above ground after t seconds is given by the quadratic function h = –16t2 + vt, where h represents the height of the object in feet, and v represents the object's initial velocity in feet per second.

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