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OpenStudy (anonymous):
a signal flare is fired into the air from a boat. The height of the flare in feet, t seconds after it is fired is h = -16t^2 + 160t . Find the max. height of the flare, and the time when it reaches its max. height.
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OpenStudy (isaiah.feynman):
I'm not sure but try finding the vertex of that quadratic equation and see if its right.
OpenStudy (anonymous):
x of vertex = -b/2a y of vertex = f(-b/2a)
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