1. A parabolic dish is part of a radio telescope. At the parabola's focal point (focus), radio waves are gathered. The parabolic dish's vertex is located 40 feet away from the focus. The dish's vertex is situated 100 feet to the east of a computer that reads and stores data from the telescope, 50 feet above sea level. The dish has a 160-foot diameter. What is the parabolic dish's depth? Answer: