36x^3a+45xa^2=9xa( ) complete the statement.

Hi, can anyone show me how to do this problem? 100 points for this. in advance

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

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.