What is being depicted in the figures below? Interpret the figures and describe the reasons for the differences. 
Definitions:
Half-Lives
The time required for half of the atoms in a radioactive sample to decay into other elements or isotopes.
Half-Lives
The time required for a quantity to reduce to half its initial value, commonly used in the context of radioactive decay.
Half-Life
The time required for half of the atoms in a sample of a radioactive substance to undergo radioactive decay.
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