Problemas
Rowan has been spending four nights studying for her economics tests and her current grade in the course is 75 percent. She decides to take a part-time job and study only three efights for her next test. As a result, after her next test, her grade falls to 60 percent. What is Rowan's marginal cost of working one night a week? Rowan's marginal cost of working one night a week is __ A. 15 percentage points B. 75 percentage points C. 60 percentage points D. greater than 60 percentage points and less than 75 percentage points
Roztwór
Martha
élite · Tutor durante 8 años
4.6
(275 Votos)
Respuesta
The marginal cost of working one night a week for Rowan is 15 percentage points.
Explicación
## Step 1The marginal cost is the cost of the next best alternative foregone. In this case, Rowan's marginal cost of working one night a week is the difference in her grades before and after she decided to work.## Step 2Before she decided to work, Rowan was studying four nights a week and her grade was 75%. After she decided to work, she was studying three nights a week and her grade fell to 60%.## Step 3To find the marginal cost, we subtract the final grade from the initial grade. ### **Marginal Cost = Initial Grade - Final Grade**## Step 4Substituting the given values into the formula, we get:### **Marginal Cost = 75% - 60% = 15%**