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OpenStudy (anonymous):
A rocket is shot straight into the air at an inital velocity of 120 ft/sec. The height of the rocket after t seconds is given by the equation b = 120 - 4t^2. How many seconds until it reaches maximum height?
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OpenStudy (anonymous):
\[h = 120t - 4t ^{2}\] Correct equation.
ganeshie8 (ganeshie8):
calculus ?
OpenStudy (anonymous):
Yup
ganeshie8 (ganeshie8):
ok... when it reaches maximum height, its velocity becomes 0
ganeshie8 (ganeshie8):
1) find dh/dt 2) equate it to 0; solve for t
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