Question

Jane purchased a prepaid phone card for

$30
. Long distance calls cost
9
cents a minute using this card. Jane used her card only once to make a long distance call. If the remaining credit on her card is
$28.83
, how many minutes did her call last?

Answer 1

She used $1.17 to make the phone call, since 30 - 28.83 is 1.17.

If it costs 9 cents per minute, we can simpy divide 1.17 by 9, which gives us 0.13. That means that her phone call lasted 13 minutes.