4x³ + 12x² - 9x - 27

4x²(x) - 4x²(3) + 9(x) - 9(3)

4x²(x - 3) + 9(x - 3)

(4x² + 9)(x - 3)

The answer for the question shown above is the option C, which is:** C- R**<span>**egular square pyramid. **

The explanation is shown below:

By definition a regular square pyramid must be a pyramid with a square base, which means that the sides of its base have the same length.

You can identify it as a pyramid because it has an apex, a height, lateral faces that are congruent isosceles triangles and slant height (the altitute of the lateral faces).</span>

Answer

speed : metres per second (a)

perimeter : meters (b)

volume : cubic centimetres (d)

area : square metres (c)