A person in a whispering gallery standing at one
focus of the ellipse can whisper and be heard by
a person standing at the other focus because all
the sound waves that reach the ceiling are
reflected to the other person. If a whispering
gallery has a length of 178 meters, and the foci
are located 39 meters from the center, find the
height of the ceiling at the center.
OpenStax Precalculus
Height:
meters
Helpppp