How many subset of have a set containing 9elemets​

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

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?