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Mathematics, 05.12.2019 03:31 Softball5378

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shirley has a credit card that uses the previous balance method. the opening balance of one of her 30-day billing cycles was $2830, but that was her balance for only the first 2 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 19%, which of these expressions could be used to calculate the amount shirley was charged in interest for the billing cycle?

a, (019/365*30) ($2830)

b. (0.19/365*30) ($0)

c. (0.19/365*30) (2*2389+28*0/30)

d. (0.19/365*30) (2*0+28*2830/30)

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