A scientist uses a submarine to study ocean life.

Question

She begins at sea level, which is an elevation of 0 feet.
She descends 49.1 feet.
She then rises 11.9 feet.
Next, she travels down a second time, 69 feet.

Answer 1

To find the scientist's final elevation after the descents and ascents, we can follow her movements step by step:

1. Starting elevation: 0 feet (at sea level).
2. Descends 49.1 feet:
   \(0 - 49.1 = -49.1\) feet.
3. Rises 11.9 feet:
   \(-49.1 + 11.9 = -37.2\) feet.
4. Descends 69 feet:
   \(-37.2 - 69 = -106.2\) feet.

So, the scientist's final elevation is -106.2 feet.