What the heck is this??

G(x) = 2 sin(2x - π) + 4. using complete sentences, explain how to find the minimum value for the function.

Asinusoidal function whose frequency is 1/6pi

Apyramid fits exactly inside a cube. the cube and the pyramid share the same square base, and they are both exactly the same height. the volume of the cube is 66 cubic inches. what is the volume of the pyramid? explain your answer. answer asap