Mathematics, 24.05.2020 04:00 kkingstone453

A professor uses a video camera to record the motion of an object falling from a height of 250 meters. The function f(x) = –5x^2 + 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?

A. 4

B. 5

C. 6

D. 7

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