Karen purchased a prepaid phone card for $15. Long distance calls cost 11 cents a minute using this card. Karen used her card only once to make a long distance call. If the remaining credit on her card is $13.68, how many minutes did her call last?
I need help on this!
You subtract 13.68 from 15 which gives you 1.32 which you then divide by .11 since it was eleven cents per minute on the phone and you end up getting 12.
