Use the definite integral to find the area between the x-axis and f(x) over the indicated interval. Check first to see if the graph crosses the x-axis in the given interval. f(x) = 2x - 18; [8,12] The area between the x-axis and f(x) is 8 (Type an integer or a simplified fraction.)Use the definite integral to find the area between the x-axis and f(x) over the indicated interval. Check first to see if the graph crosses the x-axis in the given interval. f(x) = 4e* - 2; [- 4,3] The area between the x-axis and f(x) is (Do not round until the final answer. Then round to three decimal places as needed.)Use the definite integral to find the area between the x-axis and f(x) over the indicated interval. Check first to see if the graph crosses the x-axis in the given interval. 4 f(x) = = - -:[1.e2] The area is (Type an exact answer in simplified form.)Evaluate the definite integral. 5x X + 9 dx 5x + 9 dx = 8736.93 0 (Type an exact answer, using radicals as needed.)