Calculate the mean number of students per class at watch school. write your answers in sentences that explain what the means represent

What is 20+(5 x 2/5 )+ 3 show your work

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

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