Final answer:
Isabella's initial credit card balance is $85. After charging an additional $208, her new credit card balance becomes $293.
Step-by-step explanation:
Isabella currently owes $85 on her credit card. If she charges an additional $208 to her credit card, we can calculate her new balance by simply adding the new charges to the existing debt.
Here is the calculation:
Existing Balance: $85
New Charges: + $208
--------------------------------
New Balance: $293
Isabella's new credit card balance would be $293.