A certain radioactive isotope decays according to the formula A = Age-0.0274€, where Ao is the amount of the isotope initially present, and A is the amount present after t years. Approximately how many years will have to pass before only 50 % of a particular quantity of the isotope remains? Your answer will be the half-life of the isotope. Round to 3 decimal places. The isotope's half-life is years.

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