Question

Kira purchased a prepaid phone card for $30. Long distance calls cost $0.18 a minute using this card. Kira used her card only once to make a long distance call. If the remaining balance on her card is $25.50, how many minutes did her call last?

A) 70 minutes
B) 80 minutes
C) 90 minutes
D) 100 minutes

Answer 1

Kira's call lasted for 25 minutes.

Step-by-step explanation:

To find out how many minutes Kira's call lasted, we need to subtract the remaining balance on her card from the initial value of the card and divide that amount by the cost per minute of the call.

Initial value of card = $30

Remaining balance = $25.50

Cost per minute = $0.18

Minutes of call = (Initial value - Remaining balance) / Cost per minute

Minutes of call = ($30 - $25.50) / $0.18

Minutes of call = $4.50 / $0.18

Minutes of call = 25

Therefore, Kira's call lasted for 25 minutes.