21. A projectile is launched from a platform 18 feet high with an initial velocity of 104 feet per second, The height h of the projectile at t seconds after launch is given by h =-16r + 104t + 18 feet. (a) How many seconds after launch does the projectile attain maximum height? Show work. (b) What is the maximum height? Show work.

21. A projectile is launched from a platform 18 feet high with an initial velocity of 104 feet per second, The height h of the projectile at t seconds after launch is given by h =-16r + 104t + 18 feet. (a) How many seconds after launch does the projectile attain maximum height? Show work. (b) What is the maximum height? Show work.

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter4: Polynomial And Rational Functions

Section4.CT: Chapter Test

Problem 4CT

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