Evaluate (1/3)^3

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Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=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

(x-5)1/2+5=2 what is a possible solution?