Answer:
where is the image??? u should paste the image tooo.
The circumference of the blue circle is about: 20 cm
The circumference of the orange circle is about: 10 cm
All you need to do is solve it

or

When solved your answer is
0.25 or 1/4
------------------------
What I did to solve it was....
1. Divide top fraction by bottom fraction to get decimal
1 ÷ 2 = 0.5
2. Then multiply 0.5 by its self (the same as putting it to the ^2)
0.5 x 0.5 = 0.25
Divide I from both sides then subtract r from both sides, too so in the end:
R= (E-r)/I
Ok so any number tat makes the denomenator 0 or makes the inside of a square root negative is restricted
we only have a denomenaor so
100v=0
v=0
therefor 0 is the excluded value since 0/0 doesn't make sense