Solve.
The coroner arrives at the scene of a murder at 11 p.m. She takes the temperature of the body and finds it to be 86.7° F. She waits 1 hour, takes the temperature again, and finds it to be 84.9° F. She notes that the room temperature is 67° F. When was the murder committed?
◦ 8 p.m.
◦ 5 p.m.
◦ 7 p.m.
◦ 6 p.m.