For each sequence, state if it is arithmetic, geometric, or neither.

1) 3, 15, 75, 375, 1875, ...

2) -405, 135, -45, 15, -5, ...

3) -3, -6, -12, -24, -48

4) 1/2, 1/4, 1/8, 1/16, 1/32, ...

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