a parabolic tv antenna is 18 feet across and 8 feet deep if the receiver is placed at the focus how far is it from the vertex?
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Originally Posted by ddo a parabolic tv antenna is 18 feet across and 8 feet deep if the receiver is placed at the focus how far is it from the vertex? let the vertex be at the origin. the points , , and are on the parabola. general parabola equation w/ vertex at the origin ... equating ... find the focal point.
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