Answer:
130 m
Explanation:
Let surface of ocean be at 0 feet (sea level)
- Albatross is 100 m ABOVE surface of ocean, and
- Shark is 30 m BELOW the surface of ocean
The distance from albatross to surface is 100 and the distance from surface to shark is 30 m. The total distance between them is

Distance between shark and albatross is 130 m