Mathematics, 20.04.2020 21:08 dyllanmasters99

A toy rocket launched into the air has a height (h feet) at any given time (t seconds) as h=- 16t^2 + 160t until it hits the ground. At what time(s)is it at a height of 9 feet above the ground?

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A toy rocket launched into the air has a height (h feet) at any given time (t seconds) as h=- 16t^2...