A cross section of a parabolic reflector is 14 meters across and the focus of the reflector is 5 meters above the vertex. Write an equation for the cross section of a reflector opening upward with its vertex at (0,0). What's the reflectors depth?Attachments

The reflector is like a satellite dish, which is parabolic. The cross-section(slice) of the dish is a parabola. The standard form for this parabola is: 4py = x^2. We know to pick this form because the vertex is...
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