1/2
When you put a square root into exponential form, the square root turns into an exponential fraction. Since the square root is 2, our fraction would be 1/2
If our root was a cube root, our exponent would be 1/3, etc.
For the division part:

But I think your question differs than this..
Am I right?
as your options do not include 1
It will take 49 minutes for 9 people to paint 7 walls
divide how much it was reduced ( 5) by the original price(35)
5/35 = 0.14285, now turn that into a percent so about 14.3%