Based on the clue '84 of 4 year colleges use this most common standar...', what is the answer?

Based on the clue '81 milligrams is the standard childrens dose of th...', what is the answer? What is associated with: 8170 americans who served in the korean war are still listed as mia which stands for this? Based on the clue '83 in arkansas voted to make the right to do this ...', what is the answer? Based on the clue '833 of the dime is this metal the rest is copper', what is the answer? Based on the clue '84 union generals are buried in this cemetery in n...', what is the answer? What is referred to by '843 kenneth macalpin'? What is associated with: 85 of the cars sold in the us in 1968 had this type of large engine? What is associated with: 8500 years ago the zebu or brahman type of this animal was domesticated in asia?