Suppose that the handedness of the last fifteen u. s. presidents is as follows: 40% were left-handed (l) 47% were democrats (d) if a president is left-handed, there is a 13% chance that the president is a democrat. based on this information on the last fifteen u. s. presidents, is “being left-handed” independent of “being a democrat”? no, since 0.40 is not equal to 0.13. yes, since 0.40 * 0.47 is not equal to 0.13. yes, since 0.47 is not equal to 0.13. no, since 0.47 is not equal to 0.13.

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

Libby built a fence that was 56 \text { feet}56 feet long over 44 days. she built the same length of fence each day. how many inches of fence did libby build each day?

Nina has prepared the following two-column proof below. she is given that ∠oln ≅ ∠lno and she is trying to prove that ol ≅ on. triangle oln, where angle oln is congruent to angle lno nina made two errors in the proof. identify and correct the errors.