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https://www mathxl.com/Student PlayerHomework.aspx?homeworkid=498062986&questionidz 18flushedzfalse&cld=5170815&centerwin=yes Homework: Probiem Set One: PPF Score: 0 of 1 pt Checkpoint 2 Problem 4 and opportunity cost 4 of 16 (3 complete) Every week, Sally skates for one hour, and her grade on each French test is 90 percent. Last week, after skating for one hour, Sally considered skating for another hour. She decided to skate for another hour and cut her study time by one hour. But last week, her French grade fell to 80 percent. Did Sally make her decision on the margin? OA. Sally made her decision at the margin because she considered the benefit and cost of one additional hour of skating OB. Sally's decision was not made at the margin because she could have chosen not to go skating but didn't. C. Sally's decision was made at the margin because her grade fell by only 10 percentage points D. Sally's decision was not made at the margin because she didn't compare the total benefit and total cost of a first hour of skating OE. Sally's decision was not made at the margin because the marginal cost of a lower grade always exceeds its marginal benefit. Click to select your answer and then click Check Answer.

Explanation / Answer

Ans) the correct option is A) Sally made her decision on the margin because she compared the benefit and cost of one additional hour of skating.

Sally's opportunity cost of the third hour of skating was the drop in her grade of ten percentage points.

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