An object is thrown upward at a speed of 77 feet per second

Last updated: 7/17/2022

An object is thrown upward at a speed of 77 feet per second by a machine from a height of 6 feet off the ground. The height h of the object after t seconds can be found using the equation h= - 16t² + 77t + 6 When will the height be 89 feet? When will the object reach the ground?