What equation is used to estimate the hours since death based on algor mortis?

The correct equation to estimate the hours since death based on algor mortis is derived from the principle that the human body cools at a predictable rate after death. The standard body temperature of a living person is around 98.6°F. After death, the body temperature decreases approximately 1.5°F per hour in a typical environment.

Option B states that the hours since death can be calculated by taking the constant normal body temperature of 98.6°F and subtracting the corpse core temperature divided by 1.5. This correctly reflects the relationship that for each passing hour, the corpse temperature decreases, allowing one to estimate how long it has been since the individual died based on the current temperature of the corpse.

This equation effectively allows forensic practitioners to assess the time elapsed since death by using the current corpse temperature in conjunction with the expected cooling trajectory of a body. This method helps in crime scene investigation and can provide critical insights into the timeline of events surrounding a death.

The other options do not adhere to the principles of algor mortis and do not accurately reflect the body temperature changes that occur post-mortem, making them less suitable for estimating hours since death.