The remaining amount after 4 years is 1.25 kg
<h3>How to determine the remaining amount?</h3>The half life of a function is represented as:
Where
Ao represents the initial amount
So, we have:
In 4 years, t = 4.
So, we have:
This gives
Evaluate the expression
A = 1.25
Hence, the remaining amount after 4 years is 1.25 kg
Read more about half life at:brainly.com/question/26148784
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