If a projectile is launched vertically upward from the ground with an initial velocity of 60 ft
Question:
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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C The height is giv...View the full answer
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Related Book For 
College Algebra
ISBN: 978-0134697024
12th edition
Authors: Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
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