Please help and I have to do this as soon as possible

Which term best describes the association between variables a and b

Which expression will have the same sum as 3_8 + 1/4?

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?