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OpenStudy (anonymous):
An object launched upward with an initial velocity of 4.9m/s from a height of 9.8 m will have a height of s(t)= –4.9t^2+4.9t+9.8, where s is in meters and t is in seconds. How long will it take the object to hit the ground?
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OpenStudy (anonymous):
put s=0 and solve quadratic equation for t you will get two values of t one positive and one negative ,positive one is your answer
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