13.2 Double Integrals and Volume EXC 21EXC 22EXC 23EXC 24EXC 25EXC 27EXC 28EXC 29EXC 30EXC 3113.1113.1213.1713.2013.2213.813.1513.5513.5613.58EXC 37-40 13.3 Change of Variables: Polar Coordinates 13.30. 13.5 Surface Area 13.4213.45a13.6 Triple Integrals and Applications 13.4413.52 13.7 Triple Integrals in Cylindrical and Spherical Coordinates 13.51section projectsection project13.6313.6413.68c13.69