Question

The temperature was -20.5°F at 5 A.M. and rose 5 degrees per hour for the next 5 hours. Melissa says the temperature at 10 A.M. was -5.5°F. Which statement identifies Melissa’s error and the correct answer?

A. Melissa multiplied incorrectly. The correct answer is -0.5°F.

B. Melissa multiplied incorrectly. The correct answer is 9.5°F.

C. Melissa added incorrectly. The correct answer is 4.5°F.

D. Melissa added incorrectly. The correct answer is 5.5°F.

Answer 1

from 5 am to 10 am is 5 hours.

The temperature rose 5 degrees per hour.

Multiply the rise per hour by the number of hours:

5 x 5 = 25 degrees.

Now add that amount to the original temperature:

-20.5 + 25 = 4.5 degrees.

The answer is:

C. Melissa added incorrectly. The correct answer is 4.5°F