At 10:30 AM, detectives discover a dead body in a room and measure its temperature at 30' C. One hour later, the body's temperature had dropped to 24.8\"C. Determine how many hours had passed since the death occured (when the body temperature was a normal 37'C), by the time the body was discovered, assuming that the temperature in the room was held constant at 24'C. (Use decimal notation. Give your answer to one decimal place. Round any intermediate calculations, if needed, to no less than three decimal places.)