The marginal revenue for a certain company is given by the function R' (x) = 100x-1/2 where R'(x) is measured in dollars per unit, and x is the number of units sold. Which of the following integrals would be used to determine the total revenue of the company from the first 40 units sold? Assume that R(0) = 0. 40 f 100-¹/2 dx 0 200x¹/2 dx 40 1 40 40 1 40 fi 200x¹/2 de 100-1/2 da

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