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Algebra 21 Online
OpenStudy (anonymous):

a rocket is launched from atop a 58 foot cliff with an initial velocity of 141 ft/s. Substitute the values into the vertical motion formula h=-16t^2+vt+c. Let h=0. Use the quadratic formula to find out how long the rocket will take to hit the ground after it is launched. Round to the nearest tenth of a second.

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