Question

suppose you must divide your time between studying for your math finals and writing a final paper for your english class. the fraction of time that you spend studying math and its relation to your grade in the two classes is given in the table below.

fraction of time spent on math	math grade	english grade
20	45	92
40	65	85
60	75	70
80	82	50
100	88	0

what is the opportunity cost of increasing the time spent on math from 80 to 100 percent?

• a decrease of 50 points on the english paper
• a decrease of 20 points on the english paper
• a decrease of 15 points on the english paper
• a decrease of 13 points on the english paper

Explanation:

Step1: Identify English grades at 80% math time

English grade = 50

Step2: Identify English grades at 100% math time

English grade = 0

Step3: Calculate the opportunity cost

Opportunity cost = $50 - 0 = 50$

Answer:

a decrease of 50 points on the English paper