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bama12

  • 4 years ago

11. The layer of gold coating on a ring should be 0.03 millimeters thick when the ring is completed. A coating of 0.021 millimeters has already been applied. How many more millimeters of gold coating must be added to finish the ring?

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  1. jim_thompson5910
    • 4 years ago
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    you need 0.03 - 0.021 = 0.009 more mm of coating

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