Answer:
The green box would be [tex]\frac{1}{8}[/tex].
Step-by-step explanation:
[tex]\frac{1}{2^{3}} = \frac{1}{8}[/tex]
R.A. = 50(1 - .5)^3
your question askes for the decay factor "green box"
that number is 1/2 (.5)
