An object is thrown upward at a speed of 128 feet per second by a machine from a height of 11 feet off the ground. The height (h) of the object after (t) seconds can be found using the equation h = -16t^2 + 128t + 11 1) When will the height be 168 feet? 2) When will the object reach the ground?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter9: Quadratic Functions And Equations
Section9.6: Solving Quadratic Equations By Using The Quadratic Formula
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An object is thrown upward at a speed of 128 feet per second by a machine from a height of 11 feet off the ground. The height (h) of the object after (t) seconds can be found using the equation h = -16t^2 + 128t + 11

1) When will the height be 168 feet?

2) When will the object reach the ground?

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