What solid is formed when rotating a square about a horizontal or vertical axis through the center of the square?

The solid figure formed is a cylinder.

Step-by-step explanation:

Rotation is an example of transformation in which a given figure is rotated about a reference point (origin) or line (axis). This converts majorly a two dimensional figure into a three dimensional figure or shape.

When a square is rotated about an axis, either horizontal or vertical, it generates another shape called a cylinder. Therefore, a 2D figure(square)  generates a 3D (cylinder) shape due to rotation about an axis.

The cylinder would have circular surfaces with diameter which is the same as the length of the side of the initial square.

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step-by-step explanation:

the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

the root or roots of a polynomial are the values of the variable that makes the polynomial equal to 0. we can find the roots of a polynomial making the expression equal to 0 and then, isolating the variable (it it has just one variable).

for example, given the following polynomial:

the root or zero of the polynomial, can be found by making the expression equal to 0, and then, isolating the variable, so, finding the root we have:

therefore, we have that the root of the polynomial is equal to 2.

we must remember that the number of roots that a polynomial can have, will depend on the degree of the polynomial, a first degree polynomial have will have one single root, a second degree polynomial (quadratic expression) may have two roots and so.

hence the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

have a nice day!