What is the phase shift of a periodic function?
A) a horizontal translation of the function
B) the horizontal length of one cycle of the function
C) the number of cycles of the function that occur in one horizontal unit
D) a vertical translation of the function
THE ANSWER CANT BE B OR C

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