Irene has a credit card that uses the previous balance method. The opening

balance of one of her 30-day billing cycles was $2510, but that was her

balance for only the first 5 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 11%, which of these expressions could be used to calculate the

amount Irene was charged in interest for the billing cycle?

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 12611261 chips and a standard deviation of 118118 chips. (a) determine the 2626th percentile for the number of chocolate chips in a bag. (b) determine the number of chocolate chips in a bag that make up the middle 9696% of bags. (c) what is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies?