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18 August, 22:24

Samantha threw an apple out of the tenth floor of her apartment building. The equation y=-16t^2+120 can be used to represent the fruits height above the ground, where t represents time in seconds after she threw the apple. How long did it takr the apple to hit the ground? round to the nearest hundredth.

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  1. 19 August, 00:45
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    To hit the floor means the height is 0.

    -16t²+120=0

    -16t²=-120

    t²=7.5

    t=2.74
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