Enter The Answer. Serena parachutes from a plane at a height of 20,000 ft above sea level. Several minutes later she lands on the ground 15 ft below sea level. What was the total vertical distance that Serena parachuted?

Serena parachuted 20,015 ft.

To answer this one quickly, simply add the 20,000 ft and the 15 ft. This gives you the total vertical distance. This is because she started above sea level and ended below sea level.

Think of it like a number line. If you start at 20,000 and end at - 15, you have moved 20,015 places to the left.