A student balances the following redox reaction using half-reactions.

Upper A l plus upper M n superscript 2 plus right arrow upper A l superscript 3 plus, plus upper M n.

How many electrons will be lost in all?
1
2
5
6

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

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

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?