Finding total mass of rectangle with varying surface density

[Naldo6]

1) Homework Statement [/b]

The surface density of a rectangle varies as:
σ(x,y)=12 kg/m2+2 kg/m4(x2+y2)
The origin is located at the lower left corner of the rectangle, at point ``A.'' The rectangle has a height h=1.00 m and a length l=1.20 m. What is the total mass of this object?

 

[tiny-tim]

Hi Naldo6!

Show us what you've tried, and where you're stuck, and then we'll know how to help.