State if the body had been dead for more than or less than 12 hours based on the number of degrees lost (21 degrees).

I believe that a body loses one degree per hour after death. The 1:1 ratio in temperature to hour makes it simple; the body has been dead more then 12 hours.

which ever one is showing doing the same exercise in time intervals such as 30 seconds or a minute several times.

i have no clue xdxdxdxdxdxd