Answer:
20
Step-by-step explanation:
Work backwards.
it was 25 degrees at noon, so it was 25-11=14 degrees at 9am. Since the temperature doubled during 5am-9am, it was 14/2=7 degrees at 5am. It fell 13 degrees from midnight to 5am, so at midnight, it was 7+13=20 degrees.
You can always check your answer if you want to:
20-13=7
7x2=14
14+11=25
