Answer:
x-1
Step-by-step explanation:
By dividing it by a number that = to it
<h2>
Hello!</h2>
The answer is: A. 2π
<h2>Why?</h2>
First, in order to make it easier, let's convert the numbers into entire or decimal numbers.

So, ordering it:
C, D, A, B

So, Y=A=6.28
Have a nice day!
Is equal to 9.4 you're welcome