Radon-222 is an isotope that undergoes radioactive decay. For a sample initially containing 450milligrams of radon-222, the function m(t)=450(0.83)t models the mass of radon-222, in milligrams, remaining after t days. According to the model, how does the mass of the radon-222 in the sample change over time?
According to the model m(t)=450(0.83)t, the mass of radon-222 in the sample decreases over time.
This is because the exponential term (0.83)t represents the decay factor, which is less than 1. As t increases, the exponential term gets smaller and the mass of radon-222 decreases.