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4 March, 06:13

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

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  1. 4 March, 08:21
    0
    0.009 mm

    Step-by-step explanation:

    Find the difference between the two values.

    0.03 - 0.021

    0.009 mm more gold coating must be added to finish the ring.
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