U.S. five-cent coins are made from a combination of two metals: nickel and copper. For
Chapter 2, Problem 28(choose chapter or problem)
U.S. five-cent coins are made from a combination of two metals: nickel and copper. For every 1 pound of nickel, 3 lb of copper are used. How many pounds of copper would be needed to make 560 lb of five-cent coins? (Source: The United States Mint.)
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