Please help need answers now thank you

The volume of a cube is 8 in to the 3rd power. how long is each side?

Miguel’s teacher asks him to color 4/8 of his grid. he must use 3 colors: red, blue, and green. there must be more green sections than red sections. how can miguel color all the sections of his grid to follow all the rules

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?