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OpenStudy (anonymous):
At noon, the atmospheric pressure at a weather station was 763 mmHg. At 4 p.m., the atmospheric pressure had changed by 29 mmHg. Which expressions could represent the atmospheric pressure at the weather station at 4 p.m.? Choose two answers that are correct. A. (29 – 763) mmHg B. –(763 + 29) mmHg C. (763 – 29) mmHg D. (763 + 29) mmHg
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