The chi-square test requires that each expected frequency be equal to or greater than what number?

Ablock of wood is a cube whose side is x in. long. you cut off a 1-inch thick piece from the entire right side. then you cut off a 3-inch thick piece from the entire top of the remaining shape. the volume of the remaining block is 2,002 in3. what are the dimensions of the original block of wood?

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

Solve: 3x+y=6 4x-2y=18 show all work !