Mathematics, 09.10.2019 12:50 spiritedawayoy6378

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 −1 3/5 mg/l . it is estimated that the chloride concentration will change −2 1/15 mg/l the next year.

what is the total change that will likely occur in 2 years?

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