# A diver is 7ft above water. The diver descends 12 ft in total. How deep is he in the water?

5 feet

We have a diver standing 7 feet above the water, who then descends 12 feet. How deep in the water is the diver?

Let's think about it this way: first our diver drops 7 feet from whatever perch s/he is on to land on the water. So we've gone down 7 out of our 12 or we can say:

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The diver is 19 feet deep in the water.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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