The quadratic model f(x) = –5x2 + 200 represents the approximate height, in meters, of a ball x seconds after being dropped. The ball is 50 meters from the ground after about how many seconds?

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2015-11-07 22:13:20

The quadratic model is f(x) = -5x^2 + 200. f(x) = 50 meters x = time in seconds 50 = -5x^2 + 200 5x^2 = 150 // Here, divide both side by 5 x^2 = 30 x = seconds Or approximately 5.48 seconds

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