Ahouse is purchased in 1990 and sold in 2002 for a profit of $45 000. if the ratio of cost price to profit is 21: 5, find:

a) the cost price

b) the selling price

c) the ratio of cost price to selling price

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