At 9:00 a.m., the temperature at an Arctic observatory was -12 f . By 5:00 p.m., the temperature had risen 5 degrees. Over the next three hours, the temperature had dropped 2 degrees.
What was the temperature at 8:00 p.m.?
A. -19 f
B. -15 f
C. -9 f
D. 5 f
B. -15 f
To find the temperature at 8:00 p.m., we need to follow the given information step-by-step.
1. At 9:00 a.m., the temperature was -12°F.
2. From 9:00 a.m. to 5:00 p.m., the temperature rose 5 degrees.
Therefore, the temperature at 5:00 p.m. would be:
-12°F + 5°F = -7°F.
3. Over the next three hours, the temperature dropped 2 degrees.
Therefore, the temperature at 8:00 p.m. would be:
-7°F - 2°F = -9°F.
Therefore, the correct option is:
C. -9°F