The thousands digit of a 4 digit number is 4 greater than the hundreds digit. the tens digit is 2 times the thousands digit. the ones digit is one-half the thousands digit. what is the number?

Aplane is taking off from bangladesh headed to new york city. at the same time, a plane from new york city is headed to bangladesh is also taking off. the plane bound to new york city is traveling at 600 mph, while the plane traveling to bangladesh is traveling at 400 mph. how far from new york city will the two planes meet if the distance between new york city and bangladesh is 8,000 miles?