Ononot — A bubble chart displays X (Revenue), Y (Profit), and Z (Empl

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Data Visualizationhard

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A bubble chart displays $X$ (Revenue), $Y$ (Profit), and $Z$ (Employees). The area $A$ is proportional to $Z$ . Bubble A has radius $r_A$ representing $Z_A=100$ . Bubble B has radius $r_B=3r_A$ . What is $Z_B$ ?