Respuesta :
Answer:
33 minutes.
Step-by-step explanation:
We have been given that Martina purchased a prepaid phone card for $15 . Long distance calls cost 22 cents a minute using this card. Martina used her card only once to make a long distance call and the remaining credit on her card is $7.74.
Let us find the amount spent on the long spent call by subtracting $7.74 from $15.
[tex]\text{Amount spent on long distance call}=\$15-\$7.74[/tex]
[tex]\text{Amount spent on long distance call}=\$7.26[/tex]
Therefore, Martina spent $7.26 on long distance call.
As each minute of long distance call costs 22 cents ($0.22), so to find the number of minutes of Martina's call we will divide 7.26 by 0.22.
[tex]\text{The number of minutes of Martina's long distance call}=\frac{\$7.26}{\$0.22}[/tex]
[tex]\text{The number of minutes of Martina's long distance call}=33[/tex]
Therefore, Martina's long distance call last for 33 minutes.
