Mathematics, 13.11.2019 08:31 vale1881

Before 1982,pennies where 95% zinc and 5% copper. if a stack of pennies minted before 1982 have an approximate mass of 15 grams of copper, what is the total mass of the stack of pennies

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Before 1982,pennies where 95% zinc and 5% copper. if a stack of pennies minted before 1982 have an a...

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