Find an approximation of the area of the region R under the graph of f by computing the Riemann sum of f corresponding to the partition of the interval into the subintervals shown in the accompanying figures. Use the midpoints of the subintervals as the representative points. Round your answer to the nearest hundredth. 
__________ sq units
Definitions:
Circle
A simple closed shape consisting of all points in a plane that are a given distance from a given point, the centre.
Cartel
An association of independent firms or countries that agree to coordinate their production and pricing to monopolize a market or to influence market conditions.
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