You are a hotel manager and you are considering four projects that yield different payoffs, depending upon whether there is an economic boom or a recession. The potential payoffs and corresponding payoffs are summarized in the following table.ProjectBoom (50%)Recession (50%)A$20-$10B-$10$20C$30-$30D$50$50The variance in the returns of project D is:

In the town of Gotham the adult population is 560 thousand, the number unemployed is 25 thousand, and 185 thousand are not in the labor force. Calculate the unemployment rate

Some countries have had high inflation for a long time. Others have had low or moderate inflation for a long time. Which of the following, at least in theory, could explain why some countries would continue to have high inflation?

a. High inflation countries have relatively small sacrifice ratios and so see no need to reduce inflation. b. Inflation reduction works best when it is unexpected, and people in high inflation countries would quickly anticipate any change in monetary policy. c. In a country where inflation has been high for a long time, people are likely to have found ways to limit the costs. d. In a country where inflation has been high for a long time, there are no costs to the inflation.