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Mathematics, 11.07.2019 17:40 thuzar

Joan has a credit card that uses the previous balance method. the opening balance of one of her 30-day billing cycles was $6390, but that was her balance for only the first 3 days of the billing cycle, because she then paid off her entire balance and didn't make any new purchases. if her credit card's apr is 17%, which of these expressions could be used to calculate the amount joan was charged in interest for the billing cycle?

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