Answer:
2. B po because they gained points on first then they lost points on the second.
3. A same reason as #1
4. I think D because: (from other answer in brainly.in)
[A submarine is located at 700 feet below sea level (that is) if x is considered as the sea level, then it is located at x - 700. The submarine ascends 250 feet, (that is) its new position is increased by 250 feet from its previous position, then its new position becomes 700 - 250 = 450 feet. Hence the new position of submarine is located at 450 feet below sea level, x.]
5. If the surfer was at below sea level, yet he still continues to go down until 64 feet below, then it is C