Data collected by the oil price information service from more than 90,000 gasoline and convenience stores throughout the u. s. showed that the average price for a gallon of unleaded gasoline was $3.28 (msn auto website, february 2, 2014). the following data show the price per gallon ($) for a sample of 20 gasoline and convenience stores located in san francisco.
3.59 3.59 4.79 3.56 3.55 3.71 3.65 3.60 3.75 3.56
3.57 3.59 3.55 3.99 4.15 3.66 3.63 3.73 3.61 3.57
compute the sample standard deviation.

Francisco's credit card has an apr of 28.98%, calculated on the previous monthly balance. his credit card record for the last 7 months is shown in the table below francisco is trying to figure out what this all means. answer the following questions: what is the total amount that francisco has paid in interest over the 7 months? what is the total amount that francisco has made in payments over the 7 months? how much of francisco's payments have gone to paying down the principal on his account? what is francisco's new balance at the end of month 8? what will francisco be charged for interest for month 8?