1. The function f is continuous on the closed interval [1, 13] and has values as shown in the table below. Using the subintervals [1,4], [4, 9], and [9, 13], what is the approximation of 1 f(x) dx found by using a right Riemann sum? f(x)dx A. 213 C. 321 x f(x) 1 8 4 17 9 26 B. 296 D. 330 13 35

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