Annette has a credit card that uses the previous balance method. the
opening balance of one of her 30-day billing cycles was $2990, but that was
her balance for only the first 7 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 31%, which of these expressions could be used to calculate the
amount annette was charged in interest for the billing cycle?

Option D is correct.

Step-by-step explanation:

Previous Balance Method uses the "previous" balance, that is, the balance from the month before.

Here, it is given that the  opening balance of one of her 30-day billing cycles was $2990. This means this was previous month amount or previous balance.

So, Annette will be charged the interest on $2990.

Hence, option D is correct.

the reason why your question keeps getting deleted because this is not a school related question : )

i will answer your question though.

i never tried church's

c

step-by-step explanation:

i think because what else can be a sample of every member