On the sidelines of each of its televised football games, the FBTV network uses a parabolic reflector with a microphone at the reflector’s focus to capture the conversations among the players on the field. If the parabolic reflector is 3 feet across and 1 foot deep, where should the microphone be placed?

Question

anonymous · Answer

What does it means by "3 feet across and 1 foot deep."

anonymous · Answer

Would "3 feet across" mean the latus rectum?

anonymous · Answer

i think so

anonymous · Answer

Then what would the depth be?

anonymous · Answer

unless the three feet is the directrix and the depth is like its height

anonymous · Answer

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can you find a by replacing x, y with the given points?