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Posted by on Wednesday, July 15, 2009 at 6:41pm.

A U.S. nickel contains 3 ounces of copper for every ounce of nickel. How much nickel is required for 14 pounds of copper?

  • math - , Wednesday, July 15, 2009 at 6:49pm

    Your turn. See my last post.

  • math - , Wednesday, July 15, 2009 at 7:11pm

    x/3=14/1
    1x/1=42/1
    x=42

  • math - , Wednesday, July 15, 2009 at 7:21pm

    Oops -- your answer doesn't make sense. There's much LESS nickel than copper in the coin.

    Please try again.

  • math - , Wednesday, July 15, 2009 at 7:45pm

    I really don't understand how to work this problem.

  • math - , Wednesday, July 15, 2009 at 7:52pm

    You had the right idea -- but you didn't set up the correct proportion.

    3 is to 1 as 14 is to x.

    3/1 = 14/x

    Now -- cross multiply.

    What do you get?

  • math - , Wednesday, July 15, 2009 at 7:57pm

    I got 4.6.

  • math - , Wednesday, July 15, 2009 at 9:03pm

    Yes -- except you should round 4.66666 to 4.7 pounds.

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