A thin rectangular plate of uniform areal density ? = 2.84 kg/m2 has length of 35.0 cm and width of 21.0 cm. The lower left hand corner is located at the origin, (x,y)= (0,0) and the length is along the x-axis. There is a circular hole of radius 6.50 cm with center at (x,y) = (11.50,8.50) cm in the plate. Calculate the mass of plate.