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Mathematics, 22.07.2019 01:30 animegirl02

Aprofessor uses a video camera to record the motion of an object falling from a height of 250 meters. the function f(x) = –5x2 + 250 can be used to represent the approximate height of the object off the ground after x seconds. which is the best estimate for the amount of time elapsed when the object is 120 meters off the ground? 4 seconds 5 seconds 6 seconds 7 seconds (the answer is 5 seconds)

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