Sadie spends a winter day recording the temperature once every three hours for science class. At 9 am, the temperature was -6.2°
F. Between 9am and noon, the temperature increased by 2.6°F. Between noon and 3pm, the temperature dropped 18.6°F. Between 3pm and 6pm, the temperature dropped 6.5°F. What was the temperature at 6pm
