The differential equation governing the decay of a certain radioactive substance through time is dq -20qt dt where q is the amount of radioactive substance and t is the time. At time t = 0, the...

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Extracted text: The differential equation governing the decay of a certain radioactive substance through time is dq -20qt dt where q is the amount of radioactive substance and t is the time. At time t = 0, the initial amount of radioactive substance present is q = Qo, determine the remaining amount of the radioactive substance in the form of the explicit function q = f).