Find the mass of the region bounded by $\displaystyle {y}={8}-{x}$ and with the density function $\displaystyle \rho{\left({x},{y}\right)}={6}\cdot{x}\cdot{y}$ . Provide an answer accurate to at least 4 significant digits.

Note: The graph is an example. The scale and equation parameters may not be the same for your particular problem.

 $\displaystyle {M}{a}{s}{s}=$  Preview Question 6    

Hint: Suggest using the rectangular coordinate system.