Estimate then measure each to the nearest inch 1/2 inch and 1/4 inch

Me with this one question, and i'll upvote the brainliest answer

The square root of 9x plus 7 plus the square rot of 2x equall to 7

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