Question: Use the exponential decay model, A = Apekt, to solve the following. The half-life of a certain substance is 20 years. How long will

Use the exponential decay model, A = Apekt, to solve the following.

Use the exponential decay model, A = Apekt, to solve the following. The half-life of a certain substance is 20 years. How long will it take for a sample of this substance to decay to 66% of its original amount? It will take approximately (Round to one decimal place for the sample of the substance to decay to 66% of its original amount. years percent percent per year

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