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OpenStudy (anonymous):
"If a rock falls from a height of 38 meters on Earth, the height H (in meters) after x seconds is approximately H(x)=38-4.9x^2. When does the rock strike the ground?" How do I solve this?
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OpenStudy (anonymous):
When the rock hits the ground, what is its height?
OpenStudy (anonymous):
11 meters
OpenStudy (anonymous):
May I ask how you obtained that value?
OpenStudy (anonymous):
Let me draw you a picture.
OpenStudy (anonymous):
|dw:1361673199583:dw|
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