Metric countries rate fuel efficiency of a car by number of liters of gas required to drive 100 km if car takes 12 liters per 100 km what is it’s efficiency In miles per gallon? Use conversion 1gal= 3.7854 L and 1 mile= 1.6 km

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