Question

Donna purchased a prepaid phone card for $25. Long distance calls cost

18 cents a minute using this card. Donna used her card only once to make a long distance call. If the remaining credit on her card is $20.14, how many minutes did her call last?

Answer 1

First you figure out how much money she used so $25 - $20.14 which is equal to $5.86. Now you need to figure out how much minutes that is equal to $5.86. So you need to figure out what x is equal to in: x * ¢18 = $5.86.
x is equal to 32.555555

so she was calling for 32.555555... minutes or if you are rounding it would be 32.6 minutes

hope this helps ^^