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OpenStudy (anonymous):
A projectile is launched upward from a height of 704 feet with an initial velocity of 112 ft/s. The equation gives the height h after t seconds. find the number of seconds until it returns to the ground
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OpenStudy (anonymous):
h=-16t^2+112t+704
OpenStudy (jdoe0001):
notice your equation, which you didn't post btw is a negative parabola equation |dw:1389229254330:dw|
OpenStudy (jdoe0001):
so, set y = 0, solve like you'd any other quadratic equation you've surely done many times by now
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