Question

temperature at 4 am was -13 degrees the temperature was rising at a steady rate of 5 degrees an hour. at what time will the temperature be 12 degrees

Answer 1

Change in temperature = 12 - (-13) = 12 + 13 = 25
Number of hours = 25/5 = 5 hours.
Required time = 4 am + 5 hours = 9.am