Let R be a region bounded by x-axis and upper half of circle x + y...

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Let R be a region bounded by x-axis and upper half of circle x + y = 4. Write and evaluate the integral 1) in Cartesian coordinates 2) in polar coordinates. y dA Let R be a region bounded by x-axis and upper half of circle x + y = 4. Write and evaluate the integral 1) in Cartesian coordinates 2) in polar coordinates. y dA