Factor each polynomial​

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?