400
6 John has two hours before having to go to his part time job. He is deciding between studying for a math exam and taking a nap. If john chooses to take a nap, the opportunity cost of his decision is
a.The rest he is getting
b.The score he will earn on the math exam pg.14
c.The wages from his part-time job
d.All of the above
What is b The score he will earn on the math exam