Question: Given \(f\left( x \right)=\frac{5\ln x}{x}\)

1. Use 4 left rectangles to approximate the area bounded by \(f\left( x \right)\) and the x-axis between x = 26 and x = 49.
2. Now suppose that the function \(f\left( x \right)\) gives the rate of change of the price of hardcover novel \(f\left( x \right)=\frac{5\ln x}{x}\) dollars per year, x years after 1950. What are the units of the rectangle heights?
3. What are the units of the rectangle widths?
4. What are the units of the rectangle areas?

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