10. Circle O has a radius of 4 centimeters and is externally tangent to Circle P. The ratio of the area
of Circle o to the area of Circle P is 4 to 1. What is
the length, in centimeters, of OP?
Р
O
E. 2
G. 4
H. 5
J. 5.5
K. 6

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