UPDATE: I have converted to polar coordinates, giving density = 1.2 r Cos[theta]+ 0.7 r Sin[theta]. Then I solved the following integral:
This gave me 8.55 g which was incorrect. Where am I going wrong?
Homework Statement
A quarter disc of radius 3 cm lies in the first quadrant. The areal density is (1.2 g/cm3)x + (0.7 g/cm3)y. Determine the mass of this object.
Homework Equations
The Attempt at a Solution
For my bounds:
x: 0 to 3
y: 0 to Sqrt[3 - x^2]
When I took this integral I got...