Question

Lucky Purchased a prepaid phone card for 20$. long distance calls cost 21 cents a minute using this card. Lucy used her card only to make one long distance call. if the remaining credit on her card is $12.02 how many minutes did her call last?

Answer 1

She spent 38 minutes on her phone call

Explanation:

.21 for each minute

so .21x38=12.02

Answer 2

38

Explanation:

20-12.02=7.98

7.98÷0.21=38