What is this? Please answer with an explanation

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

For what value of (y) is 3^3/3^y =1/9

Acylinder with a base diameter of x units has a volume of jxcubic units which statements about the cylinder are true? check all that apply. the radius of the cylinder is 2 x units. the radius of the cylinder is 2x units. the area of the cylinder's base is 200 square units. the area of the cylinder's base is a square units. the height of the cylinder is 2x units. the height of the cylinder is 4x units. mark this and return save and exit next submit