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4. The reflecting dish of a parabolic microphone has a cross-section in the shape of a paral The microphone itself is placed on the

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4. The reflecting dish of a parabolic microphone has a cross-section in the shape of a paral The microphone itself is placed on the focus of the parabola. If the parabola is 24 inches and 9 inches deep, how far from the vertex should the microphone be placed? 06 inches O8 inches O 16 inches 04 inches

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