Exercise 5
Lab analysis and noble gas modeling reveal tritium activity of 0.72 TU and [latex]_{}^{3}{He_{trit}}[/latex](t) = 6.8 TU for a groundwater sample collected from a short‑screened well in 2019.
What is the [latex]\frac{_{}^{3}H}{_{}^{3}{He}}[/latex] tracer age of this groundwater?