Your looking at a catalog that sells camping supplies. some of the items are drawn in scale at a ratio of 1: 12, in cm. if a scale of the one of the items is 5cm wide, how wide is the actual item in cm?

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