Danielle earns a 8.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $625 per week. how much did she earn last week if she sold $4,300 in electronics merchandise? round your intermediate calculations and answer to the nearest cent.

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