Answer:
225 feet below sea level (or -225 feet)
Explanation:
My apologies in advance if this does not format the way its supposed to. The way I did it includes arrows and may work best on a computer.
Problem: A submarine that is 245 feet below sea level descends 83 feet and then ascends 103 feet. Which represents the location of the submarine compared to sea level.
Math: Ok, so we know that whenever something descends, that means it is going down, so let's use a negative sign. These means when something ascends, it goes up. Let's use a positive sign here. Also, note the fact that we start 245 feet below sea level. This means we should start at -245.
Now, using the data we have, let's create a math problem.
A submarine that is 245 feet below sea level descends 83 feet and then ascends 103 feet. Which represents the location of the submarine compared to sea level.
-245 <---- beginning level
-83 <---- the submarine descends
+103 <---- the submarine ascends
_______
?
So grab a calculator to do this part, or do it on your own. Once you finish, plug in the answer.
-245 -245
-83 -83
+103 ---------------> +103
______ ________
? -225 feet
So as you can see, the final answer would be -225 feet or 225 feet below sea level.
Hope this helped! Have a great day!