Answer:
-4
Step-by-step explanation:
To find the change in depth simply subtract how many meters it was below the surface by how many meters it was at the starting point.
8 - 4
Therefore, the change in depth was -4 meters.
Answer: -4 meters
8 - 4 = 4; If it started at 4 meters depth and then went down to 8 meters depth, then it submerged 4 meters.
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