Ateacher can grade 25 papers in 4 hours. how many papers can he grade in 6 hours?

Find the cosine function that is represented in the graph.

If 25% of y is 30, what is 60% of y?

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