Joey is running at a constant speed back and forth on airport moving walkways before his flight leaves in 4 hours. If Joey completes 10 round trips on the 100 foot walkway before his flight, and the walkway is moring at 450 ft per hour, what is the speed Joey is running on a non moving walkway?

According to the national center for health statistics, in 1990, 28 % of babies in the united states were born to parents who were not married. throughout the 1990s, this increased by approximately 0.6 % per year. if this trend continues, in which year will 52 % of babies be born out of wedlock? in__52 % of babies will be born out of wedlock