25% of students in 8th grade play an instrument. How many students play an instrument if there are 200 students in 8th grade.

Evaluate the expression. (9 + 5)(3 + 2)0

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

Which function has the domain x> -11