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Mathematics, 12.12.2021 01:00 ayannabrewer4408

A smart-phone is thrown upwards from the top of a 480-foot building with an initial velocity of 16 feet per second. The height h of the smart-phone after t seconds is given by the quadratic equation
h = - 16t2 + 16+ + 480. When will the smart-phone hit the ground?

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