The winner of America's Got Talent wins the chance to headline a show on a strip of land that is approximately how many miles long?
America's Got Talent:  From season three (2008) onwards, the prize includes the one million dollars, payable in a financial annuity over 40 years, and a chance to headline a show on the Las Vegas Strip. Las Vegas Strip:  The Strip is approximately 4.2 mi in length, located immediately south of the Las Vegas city limits in the unincorporated towns of Paradise and Winchester.
4.2