If a projectile is launched vertically upward from the ground with an initial velocity of 60 ft

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If a projectile is launched vertically upward from the ground with an initial velocity of 60 ft per sec, neglecting air resistance, its height s (in feet) above the ground t seconds after projection is given by

s = -16t² + 60t.

Which equation should be used to determine the time at which the height of the projectile reaches 40 ft?

A. s = -16(40)² + 60

B. s = -16(40)² + 60(40)

C. 40 = -16t² + 60t

D. 40 = -16t²

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College Algebra

ISBN: 978-0134697024

12th edition

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

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Question Posted: Feb 09, 2019 04:33 AM

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If a projectile is launched vertically upward from the ground with an initial velocity of 60 ft

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College Algebra

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