calculs 3

Note: please write down the Answer by hand on paper and also write each answer with the number of the questions

13. [-/3 Points] DETAILS SCALCET9 15.2.007. Consider the following. F ( x , y ) = 6y YA y = 3x - x2 (2, 2) D y =X (a) Express the double integral f(x, y) dA as an iterated integral for the given function f and region D. (3x - x 2 dy dx (b) Evaluate the iterated integral.12. [-/1 Points] DETAILS SCALCET9 15.1.046. Find the volume of the solid enclosed by the surface z = x2+ xy and the planes z = 0, x = 0, x = 5, and y = +8