This video lesson is from the 2018 AP Microeconomics Exam. This video is designed for students to practice the question to enhance their content knowledge on the theory of consumer choice, and as a resource for teachers to use in their classroom. There is no audio in this video lesson, just a continuous video of the questions and answers. The overall objective is for students to pause the video, answer the questions, and play the video to see if they get the questions correct. This is where teachers can explain why the answer is correct to their students if needed. I hope you find this video lesson helpful. Part (a) what is the net gain from the second hour studying history? Part (b) what is the opportunity cost of the second hour studying history? Part (c) if more time is dedicated to studying history instead of economics, what happens to the opportunity cost of studying history? Part (d) if the goal is to maximizing the sum of the test scores, how many hours should be dedicated to studying for each exam? Part (e) if there is a free hour available to study, should that hour be allocated to studying economics or history to maximize the sum of the test scores?