Question: An explosion causes debris to rise vertically with an initial speed of 72 feet per second. The formula h = -16t 2 + 72 t

An explosion causes debris to rise vertically with an initial speed of 72 feet per second. The formula h = -16t² + 72t describes the height of the debris above the ground, h, in feet, t seconds after the explosion. How long will it take for the debris to hit the ground? When will the debris be 32 feet above the ground?

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