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Yesterday, 19:41

bob purchased a prepaid phone card for $15. long distance calls cost 18 cents a minute using this card. bob used his card only once to make a long distance call. if the remaining credit on her card is $12.30, how many minutes did her call last?

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  1. Yesterday, 21:22
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    15 minutes. 15-12.30=2.7 then do 2.7:.18
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