Calculate the mass of a region DDD defined by 0≤x≤1,0≤y≤10 \le x \le 1, 0 \le y \le 10≤x≤1,0≤y≤1 with density ρ(x,y)=x+y\rho(x,y) = x+yρ(x,y)=x+y.
0.50.50.5
111
1.51.51.5
222