1. **State the problem:** A submarine starts at 80 meters below sea level and ascends at 8 meters per hour for 4 hours. We need to find its new depth relative to sea level. 2. **Identify known values:** - Initial depth: $-80$ meters (negative because below sea level) - Ascending rate: $8$ meters/hour - Time ascending: $4$ hours 3. **Calculate total ascent:** $$\text{Total ascent} = 8 \times 4 = 32 \text{ meters}$$ 4. **Calculate new depth:** $$\text{New depth} = \text{Initial depth} + \text{Total ascent} = -80 + 32 = -48 \text{ meters}$$ 5. **Interpretation:** The submarine is now 48 meters below sea level after ascending for 4 hours. **Final answer:** The submarine's new location is 48 meters below sea level.