February 19, 2017

Homework Help: math

Posted by Mary on Friday, April 13, 2012 at 12:04pm.

Please explain to work this:

A rocket is launched from atop a 105-foot cliff with an initial velocity of 156ft/s. the height of the rocket above the ground at time t is given by

h= -16t^2 + 156t + 105. When will the

rocket hit the ground after it is launched? Round to the nearest second.

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