A square has an area of 400 square miles. What is the length of each side of the square?

s= sqrt(400)

where s will be in miles.

20 miles

To find the length of each side of the square, you can take the square root of the area.

Step 1: Find the square root of the area
√400 = 20

The length of each side of the square is 20 miles.

To find the length of each side of the square, we need to take the square root of the area.

The formula to calculate the area of a square is:
Area = side * side

Given that the area of the square is 400 square miles. Let's solve for the side length:

400 = side * side

To find the length of each side, we take the square root of both sides:

√400 = √(side * side)

The square root of 400 is 20, so:

20 = side

Therefore, the length of each side of the square is 20 miles.