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## Homework Statement

Evaluate by changing to polar coordinates

## Homework Equations

Can't figure out how to make the integral stop after the sqrt(9-x^2)

[tex]\int_0^\frac{3}{\sqrt(2)} \int_x^{\sqrt(9-x^2)} e^-(x^2+y^2) dy dx[/tex]

## The Attempt at a Solution

I'm not sure where to really start on this one. I know it will end up being e^-r^2 but beyond that I'm not sure.

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