7. Ed needs to buy grass seed for the backyard. Each packet covers 2 ft2. His backyard is 8 2/3 ft wide, and its length is 3/4 its width. How many seed packets does Ed need to cover his lawn

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