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OpenStudy (anonymous):
Ball is fired at 112ft/sec. H= -16t2^+112t+30. What is maximum height and time to achieve that height. Cannot calculate time?
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OpenStudy (atlas):
If you state your complete question - maybe I can help you
OpenStudy (tkhunny):
?? Have you considered t = -112/(2*(-16)) = 56/16 = 28/8 = 14/4 = 7/2?
OpenStudy (gebooors):
Derive H(t) and solve when H'(t) = 0. Then you get time when ball is in the highest point.
OpenStudy (anonymous):
solving for h'(t) = 0 is the exact same thing as just using -b/2a
OpenStudy (anonymous):
Thanks, done.
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