On the sidelines of each of its televised football games, the FBTV network uses a parabolic reflector with a microphone at the reflectorâ€™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?
What does it means by "3 feet across and 1 foot deep."
Would "3 feet across" mean the latus rectum?
i think so
Then what would the depth be?
unless the three feet is the directrix and the depth is like its height
|dw:1338075860224:dw| can you find a by replacing x, y with the given points?