The new perry hotter book will have a cover price of $25. the local bookstore is offering two discounts $4.00 off and 20% off. a clever shopper realizes that the prices will be different depending on the order in which she claims her discounts. how much more money will she save by taking the better valued approach rather than the other approach? express your answer in cents.

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297