It takes Jonas 7 1/4 minutes to run the mile. It takes Mario 8 5/12 to run the mile. How much faster is Jonas than Mario? 5/6 minute
1 1/3 minutes
1 1/6 minutes
1 1/2 minutes

What's the difference between: x≥0 and nonnegative integer. ?

Which rational number could be graphed between -4 and -5

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