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OpenStudy (anonymous):
At what time does the rocket reach 115 m? Equation: h=-5t^2+50t h=height in metres t=time in seconds
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OpenStudy (lalaly):
115=-5t^2+50t solve for t
OpenStudy (anonymous):
how
OpenStudy (lalaly):
115m is the height, just instead of h u put 115
OpenStudy (king):
5 +or - sqrt 2 and yeah substitute 115 fr H and then factorise or use quad.eqaution frmula
OpenStudy (anonymous):
ok thnx
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