Does any one know the formula for half life

When a doggo starts to pace around in the same line for a hand full of days. what would that mean?

Amarine ecologist has constructed the conceptual model shown in the diagram. what predictions can be made from using this model? where the tertiary consumers get their energy how often primary producers are able to reproduce when bacteria and fungi initiate the process of decomposition whether other secondary consumers are present

Blank is a rock with a find dark texture that makes up the oceanic crust