It’s operations on functions

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

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