Question

Heather purchased a prepaid phone card for $30 . Long distance calls cost 14 cents a minute using this card. Heather used her card only once to make a long distance call. If the remaining credit on her card is $28.18 , how many minutes did her call last?

Answer 1

30- 28.18= 1.82 (original amount minus the amount remaining)

1.82/0.14= 13 (how much was spent off the card divided by how much each minute costs)

she was on the call for 13 minutes