An object is thrown upward at a speed of 72 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 + 72t + 19 (Tip: approximate all numbers to two decimal places.) When will the height be 45 feet? When will the object reach the ground?
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Step 1:** Set the equation h = -16t^2 + 72t + 19 equal to 45 to find when the height will be 45 feet: -16t^2 + 72t + 19 = 45 ** Show more…
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