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OpenStudy (anonymous):
PLEASE HELP QUICKLY WILL GIVE A MEDAL A radio telescope has a parabolic surface as shown below. A parabola opening up with vertex at the origin is graphed on the coordinate plane. The height of the parabola from top to bottom is 9 meters and its width from left to right is 12 meters. If the telescope is 9 m deep and 12 m wide, how far is the focus from the vertex?
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OpenStudy (anonymous):
OpenStudy (anonymous):
@Directrix please help!
Directrix (directrix):
@jdoe0001 worked this same problem. Go here to read about it: http://openstudy.com/study#/updates/51c49a41e4b055e613b8bd2e
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