PLEASE HELP I REALLY NEED IT WHAT IS 10% OF 75

Which of the following is the correct ratio for converting kilograms to grams

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

Find the root(s) of f (x) = (x- 6)2(x + 2)2.