An investor has an account with stock from two different companies. Last year his stock in company A was worth $3700 in stock in Company B was worth $3600 stock in company A has decreased 20% since last year in the stock in Company B has decreased 7%. What was the total percent decrease in the investor stock account? Round your answer to the nearest tenth if necessary

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