I believe your mistake is that you are trying to use the sector area formula ti find arc length when there is already a formula for it.
The formula for it is

So first substitute the values in and then simplify!

Now simplify!
21 × 118 is 2478 so it's

When divided ou and multiplied, this is 21.62cm!
It would be multiplication and subtraction
4(x-3)
four times
( the difference of a number “x” and three)
difference means subtraction every time.
500,000 people assuming if they all vote? Can you please provide more information about the question if you want deeper intell?
Full rotation= 360 degrees
360(5/6)= 300 degrees
The answer is 300 degrees.
Hope this helps!