Mathematics, 17.04.2020 01:34 monkemily1
4. The reflecting dish of a parabolic microphone has a cross-section in the shape of a parabola.
The microphone itself is placed on the focus of the parabola. If the parabola is 40 inches wide
and 20 inches deep, how far from the vertex should the microphone be placed?
4 inches
5 inches
8 inches
10 inches
Answers: 3
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4. The reflecting dish of a parabolic microphone has a cross-section in the shape of a parabola.
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