Step-by-step explanation:
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Answer:
The number of coins to make 6440 mm diameter is 230
Step-by-step explanation:
The diameter of the coin is 28mm
Number of coins to have 6440 mm will be
6440/28
= 230
Katrina has 8 ribbons in all, because 2 x 4 is 8 and that is the whole amount.