a coroner arrives on the scene of a homicide at 8:00 pm in a temperature-controlled room, held at 60 degrees F.The temperature of the body is given by the function T(t)=28.6e^-0.0008t+60, where t is time in minutes since 8:00 pm.

use the graph to approximate the time of death, assuming that normal body temperature is 98. 6 degrees.