B DE LEF. 19.5 ft 22.5 ft A 72 t 78 ft b. The archaeologists estimate that it will require 45 minutes to an hour to excavate each foot of the exterior walls of the temple site. Approximately how long will it take to excavate all the exterior walls? Explain in detail how you determined this. c. The entrance to the ceremony preparation room appears to be along wall AC and directly opposite vertex B. What is the distance from B to the entrance to the preparation room? d. Are any of the walls of triangle ABC perpendi