Question 17 10 Points If R denotes a region bounded above by the graph of a continuous function f (x) , below by the x-axis, and on the left and right by the lines x = a and x = b, respectively, then which of the following integrals gives the mass of the lamina with density p? A [f ( x) 12 m = p dx a 2 B m = p xf (x) dx a C m = p f (x) dx a D m=p / [f ( x)]2dx a