About 750,000 "friends in low places" joined which country star for a 1997 concert in New York's Central Park?

Dikembe Mutombo led the NBA three straight seasons, from 1994 to 1996, in which defensive stat? 72 years after it was written, which 1902 Scott Joplin ragtime piece went to No. 3 on the pop charts? What is 75% of 200 plus 200% of 75? Which 1991 operation drove Iraqi forces out of Kuwait? The original Hass avocado tree died in 2002 at age 76 in La Habra Heights, in which state? Essays by Hamilton, Madison and Jay defending the Constitution were published in book form in 1788 under what name? 790,000-year-old flints from a site in Israel provide the oldest known evidence of early humans' control of what? Eight Americans were killed on April 24, 1980, in a failed attempt to rescue American hostages held in which city?