Hello, can you help me? (It is written in the question: Calculate the division of)

The trigonometric ratios sine and secant are reciprocals of each other

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

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart