Friday
April 18, 2014

Homework Help: algebra

Posted by lee on Friday, March 1, 2013 at 11:14pm.

A parabolic microphone has a cross-section in the shape of a parabola. The microphone is placed at the focus of the parabola. If the parabola is 20 inches wide and 5 inches deep, how far from the vertex should the microphone be placed?
Can someone please help.

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