At 1:00 p.m. one day, the temperature was 8 degrees above zero. During the rest of the day, the temperature fell 3 degrees per hour. What was the temperature at 7:00 p.m. that day?
- A−13°
- B−10°
- C−7°
- D5°
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Correct answer: B
7:00 p.m. is 6 hours after 1:00 p.m. Calculate the number of degrees the temperature dropped in 6 hours:
3 × 6 = 18 degrees
Subtract that from the starting point (8 degrees) to find the solution:
8 − 18 = −10 degrees