Answer:

Step-by-step explanation:
Given

Required
Select an equivalent expression

Simplify the power

Apply law of indices:

Express decimal as fractions

Assume that the radius of the circle is 1.
The diagonal of the square is 2. By the Pythagorean Theorem, the side of the square of a right triangle will be 2/sqrt(2).
Finally, the ratio of the square to the circle, in area, will be
(2/sqrt(2))^2 : pi*(1)^2 = 2 : pi
We can conclude that the white area is about 35%.
I did the answers on the picture.