If a ball is thrown upward at 128 feet per second from the top of a building that is 120 feet high, the height of the ball is given by S = 120 + 128t − 16t2 feet where t is the number of seconds after the ball is thrown. How long after it is thrown is the height 120 feet?

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter7: Applying Fractions
Section7.8: Work Problems
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If a ball is thrown upward at 128 feet per second from the top of a building that is 120 feet high, the height of the ball is given by

S = 120 + 128t − 16t2 feet

where t is the number of seconds after the ball is thrown. How long after it is thrown is the height 120 feet?

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