Select the correct Answer for each question.
-Use the Theorem of Pappus to find the volume of the solid obtained by revolving the region bounded by the graphs of 
and 
about the y-axis.
Definitions:
AVC Curve
A graph representing the Average Variable Cost of producing different quantities of output, typically showing how AVC decreases and then increases.
Market Demand
The overall sum of a particular good or service that every customer in a market is eager and able to acquire at a range of prices.
Equilibrium Price
The market price at which the quantity demanded equals the quantity supplied, leading to market equilibrium.
Purely Competitive Market
A market structure characterized by a large number of small firms, identical products, and free entry and exit, leading to price-taking behavior.
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