The minimum distance from Earth to the sun is 91.4 million miles. The maximum distance from Earth to the sun is 94.5 million miles. Which of the following equations can model this scenario, where d represents distance between Earth and sun? 94.5 − d = 91.4 94.5 − d = 91.4 |d − 91.4| = 94.5|d − 91.4| = 94.5 |d −92.95| = 1.55|d −92.95| = 1.55 94.5 + d91.4

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