Suppose an electrical charge is distributed over a region R in the xy-plane and the charge density at a point (x,y) is given by Ï(x,y) . Then the total charge is given by Q-Io( x,y) dA . 7. Electric charge is distributed over the triangular region shown below so that the charge density at (x,y) is Ï(x,y)-2xy , measured in coulombs per square meter (c/m2 ) . Determine the tota charge on D. 0,4)(2,4) 2,0)