For two individuals who engage in the same two productive activities, it is impossible for one of the two individuals to a. have a comparative advantage in both activities. b. have an absolute advantage in both activities. c. be more productive per unit of time in both activities. d. gain from trade with each other.

The economy of the united states is best described as

Dr. robbins wants to know if there are different opinions regarding the value of public school education between native americans who have at least one relative who attended indian boarding school and native americans who have no family experience with indian boarding school. dr. robbins contacts 35 native american participants in each group. he wants each group to include younger as well as older adults, and a mix of male and female participants. he asks each person to complete a survey about their attitudes toward public education. the design of this study is:

The pka of three different c―h bonds is given below. explain the observed trend in pka. select the single best answer.