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On January 22 in 1943, the town of Spearfish, South Dakota, set the record for the world’s fastest temperature change. At 7:30 a.m., the temperature was −4°F. By 7:32 a.m., the temperature was 45°F. By 9:00 a.m. the same day, the temperature was 54°F. By 9:27 a.m., the temperature was −4°F. What is the difference between the temperature at 7:30 and the temperature at 9:27? Make sure to show whether the change was positive or negative.
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Nothing changed, so 0.

Step-by-step explanation:

The temperature went up 58 degrees and then was down 58 degrees by 9:27.
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Nothing Changed

Step-by-step explanation:

at 7:30 it was −4°F and at 9:27 it was still −4°F.
However in-between the timelines +58° then it went down 58°
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