Question

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?

Answer 1

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

Answer 2

Would "3 feet across" mean the latus rectum?

Answer 3

i think so

Answer 4

Then what would the depth be?

Answer 5

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

Answer 6

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