Find the centroid (center of mass) of the following thin plate, assuming constant density. Use symmetry when poss to simplify the calculations. The region in the first quadrant bounded by x2 + y2 = 225 Make a sketch of the region. Choose the correct answer below. O A. O B. O C. O D. Ay Ay Ay + Ay 18- 18 18- X 18 18 18 Set up the double integral that gives My, the plate's first moment about the y-axis. Use increasing limits of integration Assume a density of 1. 00 My = () dy dx (Type exact answers.) 00