Which quadratic function has one real solution? 0 = 2(x + 7)(x - 5)
5 0 = (x – 3)(– 3)
0 = 2.4(x - 2)(x + 2)
0 = {(x - 2)(x - 1)

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