Find the intensity I of an earthquake measuring R on the Richter scale 
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Costa Rica in 2009, 
Definitions:
Equilibrium Quantity
The quantity of goods or services that is supplied and demanded at the equilibrium price, where demand equals supply.
Decrease in Price
A reduction in the cost at which goods or services are sold, often leading to increased demand.
Increase in Quantity
A rise in the amount of goods or services produced or supplied.
Market Equilibrium
The state in which market supply and demand balance each other, leading to stable prices.
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