If an element decays continuously, we can use the following equation to model the situation.
Its components can be defined as shown below.
With this, we can analyze the equation that models the tritium decay.
Therefore, the initial amount of uranium is 10 milligrams. Looking at the graph, we can read the initial value as 15.
Radium has the highest amount in the beginning.
We can also find the remaining amount after 10 years by substituting t=10 in the given equation.