Mathematics, 20.10.2019 20:30, ciel8809

Acoin contains 1.25 grams of nickel and 3.75 grams of copper, for a total weight of 5 grams. what percentage of the metal in the coin is copper?

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Acoin contains 1.25 grams of nickel and 3.75 grams of copper, for a total weight of 5 grams. what pe...