Right answers only, please and thanks. 7th grade advanced math (8th grade work)

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?

What number line represents the solution set for the inequality -1/2 greater than or equal to 4

Two rectangular prisms have the same volume. the area of the base of the blue prism is 418 4 1 8 square units. the area of the base of the red prism is one-half that of the blue prism. which statement is true?