Find the arc length of the curve 
from x = 1 to x = 2.
Definitions:
Free International Trade
The exchange of goods and services across international borders without restrictions such as tariffs, quotas, or subsidies.
Importer
An individual or company that buys goods or services from abroad for domestic use or sale.
World Price
The international market price of a good or service, determined by global supply and demand.
Domestic Supply
The total amount of a product or service that is available for consumption or use within a domestic market.
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