Question

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

Answer 1

9514 1404 393

Answer:

f(1) = 173 = the amount remaining after 1 year

Explanation:

The function definition tells you f(x) is the amount of the isotope remaining after x years. Then ...

f(1) = 173 = the amount remaining after 1 year

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(no units are given, so we don't know if that is 173 nanograms, or 173 truck loads)