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Math Help - Double Integral

  1. #1
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    Double Integral

    I need help setting up this problem

    Electric charge is distributed over the disk x^2+y^2 \leq 19
    so that the charge density at (x,y) is \sigma(x,y)=9+x^2+y^2 coulombs per square meter.
    Find the total charge on the disk.
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  2. #2
    MHF Contributor matheagle's Avatar
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    What's the definition of total charge? Is it...

    \int\int_D \sigma dA?

    Anyhow this looks like polar to me.
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