The graph below shows the mass of a decaying nuclide versus time. 
What is the half-life of the decay?
Definitions:
Stay-at-home Parents
Denotes parents who choose to stay at home to manage the household and care for their children instead of working outside the home.
Single-parent Family
A family structure consisting of one parent living with their children due to various circumstances.
Noncustodial Parent
A parent who does not have primary legal or physical custody of their child by court order.
Emotional Struggles
Refers to difficulties managing and coping with feelings, which can affect an individual's mental health and overall well-being.
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