What is referred to by '60'?

Based on the clue '60 of pennsylvania is covered by this which gives ...', what is the answer? Based on the clue '60 people in singapore linked these office supplie...', what is the answer? Based on the clue '60 second beef dish 65', what is the answer? What is referred to by '60 texan enrollment eric'? Based on the clue '600 miles offshore these ecuadoran islands are kno...', what is the answer? Based on the clue '600 pound mahala mullins won fame by selling this ...', what is the answer? What is associated with: 600000 people in the us have migrated from this caribbean republic of just over 8 million? What is associated with: 604800 seconds equal one of these?