Mathematics, 17.04.2021 08:20, hokamidat

Carmen purchased a prepaid phone card for $20. Long distance calls cost 6 cents a minute using this card. Carmen used her card only once to make a long distance call. If the remaining credit on her card is $18.68, how many minutes did her call last?
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Carmen purchased a prepaid phone card for $20. Long distance calls cost 6 cents a minute using this...