What is 9/11 +2/3 and show the work

What is the exact volume of the cylinder (radius 13 in., height 30 in.)

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

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.