Do the ratios 6/1 and 18/3 forma proportion yes or no?

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

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

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract