To find the new position of the submarine relative to sea level after ascending 275 feet from 800 feet below sea level, you can use the following calculation:
- Start at -800 feet (since it's below sea level).
- Ascend 275 feet, which means you add 275 to -800.
So the calculation is:
\[ -800 + 275 = -525 \]
The new position of the submarine is 525 feet below sea level.
Answer: -525 feet.