document.write( "Question 889975: a laboratory designed a radio telescope that had a diameter of 360ft and a maximum depth of 38ft.
\n" ); document.write( "the locator should be located at approximately how many ft above the vertex \n" ); document.write( "

Algebra.Com's Answer #538596 by Fombitz(32388) $\"\"$ $\"About$

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Assume the vertex is located at (0,0).
\n" ); document.write( "Another point on the parabola would be (360/2,38) or (180,38)
\n" ); document.write( "Using the focus form of a parabola,
\n" ); document.write( " $\"4fy=x%5E2\"$
\n" ); document.write( " $\"4f%2838%29=%28180%29%5E2\"$
\n" ); document.write( " $\"f=%28180%29%5E2%2F%284%2838%29%29\"$
\n" ); document.write( " $\"f=213.1\"$ $\"ft\"$
\n" ); document.write( " \n" ); document.write( "

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