Final answer:
The climber descended 543 feet.
Step-by-step explanation:
To find the number of feet the climber descended, we need to subtract her final position from her initial position. Her initial position is 533 feet above sea level, and her final position is 10 feet below sea level.
To calculate the descent, we subtract the final position from the initial position:
533 feet - (-10 feet) = 533 feet + 10 feet = 543 feet.
Therefore, the climber descended 543 feet.