Question

An object is thrown upward at a speed of 78 feet per second by a machine from a height of 19 feet off the ground. The height h of the object after t seconds can be found using the equation h = -16t^2 + 78t + 19 (Tip: approximate all numbers to two decimal places.) When will the height be 78 feet? When will the object reach the ground?

          An object is thrown upward at a speed of 78 feet per second by a machine from a height of 19 feet off the ground. The height h of the object after t seconds can be found using the equation h = -16t^2 + 78t + 19
(Tip: approximate all numbers to two decimal places.)
When will the height be 78 feet?
When will the object reach the ground?

An object is thrown upward at a speed of 78 feet per second by a machine from a height of 19 feet off the ground. The height h of the object after t seconds can be found using the equation h = -16t^2 + 78t + 19
(Tip: approximate all numbers to two decimal places.)
When will the height be 78 feet?
When will the object reach the ground?

Added by Jose N.

Elementary and Intermediate Algebra

Alan S. Tussy, R. David Gustafson 5th Edition

Instant Answer

Solved by Expert Kelly Mcneil

07/14/2022

Step 1

\[16t^2 + 78t + 19 = 78\] \[16t^2 + 78t - 59 = 0\] ** Show more…

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An object is thrown upward at a speed of 78 feet per second by a machine from a height of 19 feet off the ground. The height h of the object after t seconds can be found using the equation h = -16t^2 + 78t + 19. (Tip: approximate all numbers to two decimal places.) When will the height be 78 feet? When will the object reach the ground?