Question

a submarine was situated 800 feet below sea level.
if it ascends 275 feet, what is its new position relative to the sea level?
answer:
feet

Explanation:

Step1: Define initial position

Let's represent the position below sea level as negative. So the initial position is $-800$ feet.

Step2: Calculate new position

The submarine ascends 275 feet, which means we add 275 to the initial position. So the new position is $-800 + 275$.
$$-800 + 275=-525$$

Answer:

-525