Answer:
feet : Shark is 72 feet below sea level.
Step-by-step explanation:
Let x represent depth of the shark.
We have been given that the submarine’s depth was twice the depth of the shark. This means that depth of submarine would be .
We have been given that a submarine was 144 feet below sea level, so submarine's elevation would be .We can represent this information in an equation as:
To find shark's position, we need to solve for x.
Therefore, feet represents shark's elevation, which represents that shark is 72 feet below sea level.