1. The problem statement, all variables and given/known data Find the center of mass of the 2-dimensional plate which occupies the region inside the circle x^2 + y^2 = 2y, but outside the circle x^2 + y^2 = 1, and for which the density is inversely proportional to its distance from the origin. 2. Relevant equations m = integral (p(x,y)) dA 3. The attempt at a solution -> m = integral k/r x^2 + (y-1)^2 = 1 It's not the integration itself I'm having trouble with just finding the boundaries of integration as they are between the two circles, any help/hints would be appreciated. Thanks!