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November 20, 2014

Homework Help: Math: Word Problem

Posted by Amy~ on Tuesday, September 7, 2010 at 10:58pm.

A ball is thrown upward from the top of a building which is 96ft tall w/ Initial velocity of 80 ft per sec.
Distance s(ft) of ball from the ground after t sec is s=96+80t-16t^(2)

1) how many sec. will the ball pass the top of the building when it is coming down?

How would I solve this?

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