In Problems 13-16, write a differential equation that fits the physical description. The rate of change of the mass A of salt at time t is proportional to the square of the mass of salt present at time t.
The differential equation suitable for the given condition is , where A is the mass of salt at a time t.
By analyzing the given statement,
, where A is the mass of salt at a time t.
, where k is the constant of proportionality.
Hence, is the required differential equation.
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