The amount of a radioactive isotope decays in half every year. The amount of the isotope can be modeled by f(x) = 346(1/2)x and f(1) = 173. What does the 1 represent?

The amount of a radioactive isotope decays in half every year The amount of the isotope can be modeled by fx 34612x and f1 173 What does the 1 represent class=
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