math

I have two questions:

The temperature changed from 7ºF at 6 P.M. to -5ºF at midnight. What was the difference between the high and low temperatures? What was the average change in temperature per hour? The difference between the temperatures is 12ºF because 7 - (-5) = 7 + 5 = 12.
What I need help with is the average change in temperature per hour, I don't understand what it's asking for or how to do it, is it asking for the mean between the temperatures ? Please show work and explain.

Second question: At 11,560 feet above sea level, Climax, Colorado, is the highest town in the United States. The lowest is Calipatria, California, at 185 feet below sea level. How much closer to sea level is the town that is closer?
How do I show which is closer ? I forgot how to show absolute value if that's what it's asking for. Thanks~

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  1. 1. The temperature dropped 12 degrees in 6 hours. Divide 12 by 6 to find the average hourly change.

    2. Subtract 185 from 11,560.

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    Ms. Sue

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