I think the answer in this case would be D
Answer: 2.5
Step-by-step explanation:
You have the following fraction given in the problem above:
5/2
Where the number on the top is called the numerator and the number on the bottom is called denominator.
To solve this exercise you must divide the numerator 5 by the denominator 2.
Therefore, you obtain the folloowing result:
5/2=2.5
We must find a pattern in the powers of 3:
So, as you can see, both 
and 
end with 1. So, we can generalize as follows:
Since 
, we can deduce that 
ends with 9.
