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Mathematics, 12.10.2020 23:01 Mullins4

Please In 4 years, a reef’s elevation fell from 10 mm above sea level to 2 mm below sea level. The expression (-2-10)•4 gives the change in elevation per year. What was the change in elevation in mm per year? A. 2mm/yr B. -2mm/yr

C. 3mm/yr D. -3mm/yr

Explanation please!

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