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A drawing of a microphone is shown. The microphone is placed at the focus of a parabolic reflector to collect sound. Write an equation that

A drawing of a microphone is shown. The microphone is placed at the focus of a parabolic reflector to collect sound. Write an equation that represents the cross section of the parabolic reflector, assuming the vertex is at the origin and the parabola opens right. Use x and y as your variables.

13 in. microphone 

13 in. microphone

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