3. Titanium-44 is a radioactive isotope with a half-life of 63 years. Write an exponential equation to model the amount, A(t), remaining after t years from an initial sample of 20 mg. Show all work algebraically. а. b. How much of the sample will remain after 30 years? Show all work algebraically. When will the sample decay to 2 mg? Show all work algebraically using logarithms. С.

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