Heather bought 3 bags of candy. Each bag was originally priced at $5.00 each, but were on sale for $2.00 off the original price. She gave the cashier a twenty-dollar bill. Which equation represents the amount of change she should recieve? A. 20-3x5-2=c C. 20-3(5-2)=c
B. (20-3)(5-2)=c D. 20+3(5-2)=c

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