
Concept explainers
Physics A ball is thrown vertically upward with an initial velocity of 80 feet per second. The distance (in feet) of the ball from the ground after seconds is .
(a) At what time will the ball strike the ground?
(b) For what time is the ball more than 96 feet above the ground?

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Precalculus Enhanced with Graphing Utilities Plus MyLab Math with Pearson eText - Access Card Package (7th Edition) (Sullivan & Sullivan Precalculus Titles)
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