Suppose the star pitcher on a university's baseball team, who is now a sophomore, decides to finish college instead of joining a major league team. In doing this, he is giving up a $40,000 salary for each of the next two years. At an interest rate of 10 percent, the total value of this sacrifice is approximately

One result of a decrease in aggregate demand and no change in aggregate supply is

A) a recession. B) an increase in employment levels. C) an economic expansion. D) a rise in the price level.

Suppose there are three power-generating plants, each of which has access to 5 different production processes. The table below summarizes the cost of each production process and the corresponding number of tons of smoke emitted each.ProcessABCDE(smoke/day)(4 tons/day)(3 tons/day)(2 tons/day)(1 tons/day)(0 tons/day)Cost to Firm X ($/day)$500$514$530$555$585Cost to Firm Y ($/day)$400$420$445$480$520Cost to Firm Z ($/day)$300$325$360$400$550 Suppose the government requires each firm to reduce pollution to 2 tons of smoke per day, so that total daily smoke emission is 6 tons. The total cost to society of this policy will be ________ per day.

A. $59 B. $135 C. $230 D. $42