Solution:
An elevation of -10 ft would be less than -5 ft from sea level.
- (NOTE) When it comes to negative integers on a number line, just keep in mind that the closer to 0 the negative integer is, the greater in value it becomes. However, the further away from the zero mark the integer is, the value decreases/is a smaller number.
This being said, lets look at the given options.
- A) -10 feet ← Notice when you place -10 on the number line, the point is far to the left of the zero mark, as well as -5. This being said, this most likely means that this is a lesser elevation level than that of -5 feet from sea level.
- B) -3 feet ← Notice when you place -3 on the number line, the point is also to the left of the zero mark, however it is ahead of -5. This being said, this elevation is not lesser than -5 feet from sea level, and hence not the correct choice.
- C) 2 feet ← Notice when you place 2 on the number line, the point is just to the right of the zero mark and is definitely ahead of -5 feet. This means that this elevation is not lesser than -5 feet from sea level, and hence is not the correct choice.
- D) 5 feet ← Notice that when you place 5 on the number line, the point is to the right of the zero mark and is definitely also ahead of -5 feet. This being said, this means that this elevation is not lesser than -5 feet from sea level, and hence is not the correct choice.
Hence, in conclusion to all of this, our correct choice would be A) -10 feet, considering it is the only elevation that is less than -5 feet from sea level.
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Hope this helps!