luckycharm12 luckycharm12

21-05-2017
Mathematics

contestada

The height of a ball is modeled by f(x)= -16x^2 + 128x, where x is the number of seconds after the ball is hit. How long is the ball in the air?

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emarina emarina

21-05-2017

0=-16x^2+128x
x= 8 seconds

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