Darla earns $17.50 per customer when she gives haircuts. If she gave a haircuts on Monday and y haircuts on Tuesday, which expression shows the amount of money she earned? A 17.50x + y B 17.50 (2 + y) 17.50 D 17.50.my​

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