Question: Suppose that dP/dt = 0.15P(t) represents a mathematical model for the growth of a certain cell culture, where P(t) is the size of the culture

Suppose that dP/dt = 0.15P(t) represents a mathematical model for the growth of a certain cell culture, where P(t) is the size of the culture (measured in millions of cells) at time t > 0 (measured in hours). How fast is the culture growing at the time when the size of the culture reaches 2 million cells?

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