A cardboard figure has the shape shown below. The region is bounded on the left by the line x = a, on the right by the line x = b, above by f(x), and below by g(x). The density p(x) in gm/ cm2 varies only with x.
Find the integral needed for the total mass of the figure. Give your answer using the form below.
I know that A =a and B=b as far as the limit of integration and that the area is (f(x)-g(x)) dx so mass is (f(x)-g(x)) dx* p(x) but im not sure how to expresses it as H(x), and anyone please help. Thank you