Mathematics, 11.07.2019 04:20 Serenitybella

An object is thrown upward at a speed of 152 feet per second by a machine from a height of 9 feet off the ground. the height h of the object after t seconds can be found using the equation h=−16t^2+152t+9
when will the height be 231 feet?
when will the object reach the ground?

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An object is thrown upward at a speed of 152 feet per second by a machine from a height of 9 feet of...