QuestionRaina's phone card has $C=45.00-0.06x$. How much credit is left after 15 minutes of calls?

Studdy Solution
Calculate the remaining credit on the card.
$$Remaining\, credit = \$45.00 - \$0.9 = \$44.1$$After Raina uses the card for15 minutes of calls, the remaining credit on the card is $44.1.