Please help being timed

Which of the following tables represents exponential functions?

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?

Mr. walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?