A Cross-Country Skier Reaches the 10-Km Mark of a Race

question 81

Multiple Choice

A cross-country skier reaches the 10-km mark of a race 40 min after reaching the 2-km mark. Find the average rate of change in the speed of the skier.

• A)15 km/hour
• B)12 km/hour
• C)8 km/hour
• D)16 km/hour

---

Definitions:

AC

Average Cost; the total cost of production divided by the number of units produced, indicating the cost per unit.

Producer Surplus

The difference between the amount producers are willing to supply goods for and the actual amount received by them when sold.

Perfectly Competitive Industry

An economic theory describing a market structure where firms sell identical products, no single buyer or seller can influence the market price, and information is freely available.

AC

AC, or Average Cost, is the cost per unit of output, calculated by dividing the total cost by the quantity of output produced.