The combined semicircular and triangular regions below make up region D, with units of centimeters. If the mass density of D is p(x, y) = 1 gram per square centimeter, find its center of mass. -4 x = cm y = Add Work Submit Question cm A lamina with inner radius 1 and outer radius 3, shown here (not to scale): has density function: (x, y) = x x + y The coordinates of the center of mass for the lamina are: x = y = Add Work Submit Question