Question

A scientist uses a submarine to study ocean life.
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**.