what is answer and progress

7. (2003BC-25) The function fis continuous on the closed interval [2,14] and has values as show in the 14 table below. Using three subintervals indicated by the data, what is the approximation of [ f (x) dx found by using a right Riemann sum? X 2 5 10 14 f (x) 12 28 34 30 (A) 296 (B) 312 (C) 343 (D) 374 (E) 390 8. (1998-85) The function f is continuous on the closed interval [2,8] and has values that are given in the table below. Using three subintervals indicated by the data, what is the trapezoidal approximation of jf ( x ) dx ? X 2 5 7 8 f(x) 10 30 40 20 (A) 110 (B) 130 (C) 160 (D) 190 (E) 210 9. The most general antiderivative of f(x) = (secx) cot .x is sin x (A) sec xtan x+ C (B) -esexcotx+C (C) -cotx + C (D) cos x + C 10. If [ f(x)dex = 2 and [ f(x)dx = -1, find ] [25(x)]dx (A) 2 (B) -3 (C) 3 (D) -6 (E) 6 11. The graph of a piecewise-linear function f, for -ISx 4, is shown below. What is the value of O L (A) 1 (B) 2.5 (C) 4 (D) 5.5 (E) 8