Problem #12: Which of the following represents the area of the region enclosed [3 marks] by the curves y = x and y = 3x + 18 for -4 sxs 6? -2 (A) (x2 - 3x- 18) dx + [(7 + 3x + 18) dx (B) (x2 - 3x - 18) dx+ [ (- x 2 + 3x + 18 ) dux + (x2 - 3x - 18) dx ST -3 (C) (x2 - 3x - 18) dx + (-x2 + 3x + 18) dx (D) (x2 - 3x - 18) dx - 3 (E) (x2 - 3x - 18) dx+ [ (2 + 3x+ 18) dx (F) [ (12 - 3x - 18) dox + ( -x 2 + 3x + 18) dx (G) (-x2 + 3x+ 18) dx+ (x2 - 3x - 18) dx (H) (x2 - 3x - 18) dx + [(-x2 + 3x + 18) dx Problem #12: Select v Save Your work has been saved!_(Back to Admin Page)Problem #13: The graph of f is given to the right. [3 marks] Evaluate f(x) dx. 3 y =f (x) / 2 1 3 -2 -1 0 1 2 3 X Round your answer to 3 decimal places