Juan and Alex are both saving money for college. Juan saves $150 per month and currently has $2000 in the bank. Alex saves $250 per month and has only $1000 in the bank. Not counting the interest they will earn, how many months will it take until both boys have saved the same amount of money?

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