Mathematically, this can be written as:
\[m_{payload} + \rho_{He} \cdot g \cdot V_{He} = \rho_{air} \cdot g \cdot V_{balloon}\]
where \(m_{payload}\) is the mass of the payload, \(\rho_{He}\) is the density of helium, \(g\) is the acceleration due to gravity,
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