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Please help me out on this question

Please help me out on this question-example-1

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It drops from 12 degrees by 2.5 degrees, making it 9.5 degrees F. It then increases by 4 degrees, meaning you need to add it to the 9.5 degrees. Therefore, after the changes, the temperature is 13.5 degrees F.
User Wilianto Indrawan
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