Gualerto has a barrel that collects rain water. As the rain water evaporates, the height of the rainwater changes from 24.83 in. to 18.08 in. over a period of 5 2/5 days. What is the average change in the height of the rainwater each day?

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