Answer:
531 feet
Step-by-step explanation:
Given that,
A climber starts descending from 511 feet above sea level and keeps going until she reaches 20 feet below sea level.
We need to find the distance she descended.
The climber descends 511 feet to reach sea level. The climber then descends an additional 20 feet to reach 20feet below sea level. So the climber descends:
511 ft + 20 ft = 531 ft
So, she descended 531 feet.
