No one is island. We share the world with parents, friends, teachers and classmates. Most of the time, we get on well with each other. But sometimes we disagree as well.
【单选题】Mr. Cog has 18 hours per day to divide between labor and leisure. His utility function is U(C,R) = CR; where C is dollars per year spent on consumption and R is hours of leisure. If he has 19 dollars ...