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Mathematics, 11.11.2020 19:40 santiagodiaz727

If the temperature is -20 °F at 6:00 a. m, school will be cancelled for the day. The temperature is 10 °F at 9:00 p. m. What must change in temperature be in order for school to be cancelled the next day?

A. -30
B. -10
C. 10
D. 20
E. 30

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