Question

One day at 3:00 am the temp was -13 degrees f in Kodiak Alaska. At 10:00 am the temp was 22 degrees f. What was the average change in temp per hour?
total change: 35 degrees
total time: 7 hours

so, average change is

35°/7hr = 5°/hr
how did you get 7
3:00 subtracted by 10:00 is 7 so 7 hours

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