<PRE><B>Question 310825</B>
On a geologist map,an elliptical lake with center (0,0) has vertex (0,9) and co-vertex (6,0).what is the equation of the ellipse?
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semi-major axis is 9
semi-minor axis is 6
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Equation:
x^2/36 + y^2/81 = 1
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Cheers,
Stan H.</PRE>