a high school student working part time as a cook had a gross income $7650 last year. If his federal tax rate was 10% and his state tax rate was 5.3% what was the amount withheld from his pay last year in federal tax, state tax, and FICA combined

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