Amber owns a skateboard shop. amber wants to buy one thousand eight hundred forty six skateboard wheels. skateboard wheels sell in sets of two. a set of two skateboard wheels cost five dollars and seventy-five cents. how much money does amber spend to buy one thousand eight hundred forty-six wheels/ amber puts four wheels on every skateboard. on how many skateboards can amber put four wheels. show all your mathematical thinking

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