Mark spends a total of $68.82 for 2 pairs of sneakers with the same cost. the sales tax is $5.32. mark also uses a coupon for $3.00 of his purchase. how much did each pair of sneakers cost?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?