At 6:00 A.M., the temperature was -8°F. By noon, it had risen by 20°F. Between noon and 3:00 P.MM.. The temperature rose by 4°F. During the next 5 hours it dropped 3°F per hour. What was the temperature by 8:00 P.M.?
-8 + 20 + 4 + 5(-3) = 1°F at 8 PM
