Alexa has 200 square inches of wrapping paper left. Which is the side length of a cube she could not cover with the paper?

To find the side length of a cube that cannot be covered with the given amount of wrapping paper, we need to divide the total amount of wrapping paper by the surface area of one side of the cube.

Now, the surface area of one side of a cube is given by the formula: side length^2.

Let's assume the side length of the cube is 'x'. So, the surface area of one side of the cube is x^2.

We are given that Alexa has 200 square inches of wrapping paper.

So, to find the side length of the cube, we need to solve the equation:

x^2 = 200

To find the value of x, we can take the square root of both sides of the equation:

√(x^2) = √200

x = √200

Using a calculator, we find that √200 is approximately 14.14.

Hence, the side length of a cube that Alexa could not cover with the given amount of wrapping paper is approximately 14.14 inches.