Dmitri is training for a triathlon, a timed race that combines swimming, biking, and running. consider the following sentence: in order to swim for an hour, dmitri must take time away from work, where he earns $12 per hour. this is in addition to paying a $5 entrance fee for the pool. which basic principle of individual choice do these statements best illustrate? people usually exploit opportunities to make themselves better off. trade can make everyone better offmarkets are usually a good way to organize economic activitythe cost of something is what you give up to get it

Which is cheaper: eating out or dining in? the mean cost of a flank steak, broccoli, and rice bought at the grocery store is $13.04 (money.msn website, november 7, 2012). a sample of 100 neighborhood restaurants showed a mean price of $12.75 and a standard deviation of $2 for a comparable restaurant meal. a. develop appropriate hypotheses for a test to determine whether the sample data support the conclusion that the mean cost of a restaurant meal is less than fixing a comparable meal at home. b. using the sample from the 100 restaurants, what is the p-value? c. at a = .05, what is your conclusion? d. repeat the preceding hypothesis test using the critical value approach

By which distribution system is more than 90 percent of u.s. coal shipped? a. pipelinesb. trucksc. waterwaysd. railroadse. none of the above

What is the minimum educational requirement for a pediatric psychopharmacologist? a. md b. phd c. bachelors in medicine d. masters in medicine e. psyd