Which of the expressions are equivalent to the one below? Check all that apply.
5•(3+7)
O A. 5•(7+3)
B. 5.3+5:7
O C. (5.3)+7
O D. (3 + 7).5

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