A radioactive substance decays so that after t years, the amount remaining, expressed as a percent of the original amount, is

Question

A radioactive substance decays so that after t years, the amount remaining, expressed as a percent of the original amount, is A(t) = 100(1.3)¯t.
a) What is the half-life for this substance? Round to 2 decimal places.
b) Determine the rate of decay after 10 years. Round to 2 decimal places.

Kunduz · Accepted Answer

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