Answer
$2x+4y$
Work Step by Step
div $\textbf{F}=\nabla\cdot \textbf{F}=\nabla\cdot\langle x^{2},2y^{2},0\rangle$
$=\frac{\partial}{\partial x}(x^{2})+\frac{\partial}{\partial y}(2y^{2})+\frac{\partial}{\partial z}(0)$
$=2x+4y+0=2x+4y$
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