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Mathematics 13 Online
OpenStudy (anonymous):

Maya purchased a prepaid phone card for 15 . Long distance calls cost 24 cents a minute using this card. Maya used her card only once to make a long distance call. If the remaining credit on her card is 10.68 , how many minutes did her call last?

OpenStudy (anonymous):

15-10.68=4.32/.24=18 mins

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