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Mathematics 15 Online
OpenStudy (anonymous):

If an object is dropped from a height of 144 ft, the function h(t) = –16t² + 144 gives the height of the object after t seconds. When will the object hit the ground?

OpenStudy (phi):

it hits the ground when h(t)=0

OpenStudy (anonymous):

when -16t^2 = -144 it has hit the ground

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