A mining company estimates that the marginal cost of extracting x tons of copper ore from a mine is 0.7 + 0.008x, measured in thousands of dollars per ton. Start-up costs are $130,000. Set up an expression involving an integral that can be used to find the cost (in thousand $) of extracting the first 50 tons of copper. • LC dx What is the cost (in $) of extracting the first 50 tons of copper? $ What is the cost (in $) of extracting the next 50 tons? $

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Riemann Sum

Riemann Sums is a special type of approximation of the area under a curve by dividing it into multiple simple shapes like rectangles or trapezoids and is used in integrals when finite sums are involved. Figuring out the area of a curve is complex hence this method makes it simple. Usually, we take the help of different integration methods for this purpose. This is one of the major parts of integral calculus. 

Riemann Integral

Bernhard Riemann's integral was the first systematic description of the integral of a function on an interval in the branch of mathematics known as real analysis.