Mathematics - Algebra - Applications of Conics
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The cross section of a parabolic reflector with 6-inch diameter is ground so that its vertex is 0.15 inch below the rim.
(a) Find the equation of the parabola after inserting an xy coordinate system with the vertex at the origin, the y axis (pointing upward) the axis of the parabola.
(b) How far is the focus from the vertex?
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(a) The coordinates of two symmetrical points on the rim of the parabolic reflector are ...
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