During the twentieth century, what was added to the relative time scale

During the twentieth century, absolute date was added to the relative time scale.  Geologic time scale uses both relative and absolute dating techniques.  Soon after the discovery of radioactivity, geologists used radioactive isotope decay to develop a method for determining absolute ages of rocks

$100. 125 x 0.20 = 25125 - 25 = $100

It is platinum in the market value