Maria is training for a triathlon, a timed race that combines swimming, biking, and running. Consider the following sentence: Maria has only 20 hours this week that she can devote to training. Each hour she spends swimming is an hour that she can't spend biking or running. Which basic principle of individual choice do these statements best illustrate? a. Maria has an incentive to spend more time on swimming than on biking or running.
b. People usually exploit opportunities to make themselves better off.
c. Maria can use lime most efficiently by spending the same amounts of time on swimming, biking, and running.
d. People face trade-offs

Information on gerken power co., is shown below. assume the company’s tax rate is 40 percent. debt: 9,400 8.4 percent coupon bonds outstanding, $1,000 par value, 21 years to maturity, selling for 100.5 percent of par; the bonds make semiannual payments. common stock: 219,000 shares outstanding, selling for $83.90 per share; beta is 1.24. preferred stock: 12,900 shares of 5.95 percent preferred stock outstanding, currently selling for $97.10 per share. market: 7.2 percent market risk premium and 5 percent risk-free rate. required: calculate the company's wacc. (do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) wacc %

Any point on a country's production possibilities frontier represents a combination of two goods that an economy:

Explain the relationship between consumers and producers in economic growth and activity