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OpenStudy (anonymous):
If a rock falls from a height of 60 meters on the earth the height h(in meters) after x seconds is approximately h(x)=60-4.9x^2. when does the rock strike the ground. round to nearest hundred if necessary
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OpenStudy (tkhunny):
Please solve: 60 - 4.9x^2 = 0
OpenStudy (anonymous):
thank you so much it got its 3.5 sec
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