Will give brainliest plz help!

6.28cm

Step-by-step explanation:

I think for me the easiest would be to find the circumference and divide by 4, since the arc is 1/4 of the circumference of the circle.

C=2πr

C=2(3.14)(4)

C = 25.12cm

25.12cm/4 = 6.28

1/9

Or .11 repeating (~.11)

Step-by-step explanation:

36 ways, because of 6 * 6.

Now, let's analyze 12.

2 * 6,  

6 * 2,  

3 * 4,  

4 * 3.

That's 4/36 ways. Also simplified to 1/9