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The exponential decay function for 80 mg of the radioactive isotope nitrogen-12 is given by the...

The exponential decay function for 80 mg of the radioactive isotope nitrogen-12 is given by the function below, where t is in minutes:

y(t)=80e-0.0696t

Find the rate of change of the radioactive isotope after 22 minutes has elapsed. Round answer to 2 decimal places.

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