26.

2126. Variable-density plates Find the center of mass of the following plane regions with variable density. Describe the distribution of mass in the region. 26. The quarter disk in the first quadrant bounded by x2 + y2 = 4 with p(x,y) =1+Jc2 +322 2730. Double integralstransformation given To evaluate the following integrals, carry out these steps. 3136. Double integralsyour choice of transformation Evaluate the following integrals using a change of variables. Sketch the original and new regions of integration, R and S. 4144. Triple integrals Use a change of variables to evaluate the following integrals. 44. /dV; D is bounded by the upper half of the ellipsoid D x2/9 + y2/4 + z2 = 1 and the xy-plane. Use x = 3u, y = 2v, z = W