Mathematics, 31.10.2021 01:00 lilbit404

Each year, the Department of Water Works measures the chloride concentration level in the water. The first year they found the chloride concentration changed by - 13 mg/L It is estimated that the chloride concentration will change -21 mg/L the next
year
What is the total change that will likely occur in 2 years?
Enter your answer as a simplified mixed number in the box
1
mg/L

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