A projectile is launched upward from the ground. Its height s in feet above the ground after

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A projectile is launched upward from the ground. Its height s in feet above the ground after t seconds is given by the following equation. 

s = -16t2 + 320t

(a) After how many seconds in the air will it hit the ground?

(b) During what time interval is the projectile more than 576 ft above the ground?

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Related Book For  answer-question

College Algebra

ISBN: 978-0134697024

12th edition

Authors: Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels

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