I really need help for this geometry question, I would appreciate any help thank you.

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

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.