7. Half-life

Solve thegiven problem:
 
Solve the given problem:
 
38 \(g\) of radioactive substance decays to 19 \(g\) in \(2\) days. How much substance will remain un-decayed after \(10\) days?
 
Answer:  \(g\)
 
[Note: Enter your answer upto three decimal digits]
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