Answer:
1) 1 hour
Step-by-step explanation:
Marginal cost is the total cost of making the product.
Here, the Total number of hour Matias need to move from grade B to grade A is:
Time spent to get grade A - Time spend to get grade B
= 2 hours - 1 hours = 1 hours
Thus, Matias ’s marginal cost in terms of TV viewing to moving from a B to an A on the exam is 1 hour.