Math

The equation h=-16t^2+112t gives the height of an arrow, shot upward from the ground with an initial velocity of 112ft/s,where t is the time after the arrow leaves the ground. Find the time it takes for the arrow to reach a height of 120ft.

Put in h for 120, rearrange it into quadratic form, and solve. I recommend the quadradratic equation.

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asked by Audrey

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