To find the elevation at the bottom of Lake Segundo, we first determine its depth. Since Lake Segundo is 56% as deep as Lake Profondo, we can calculate the depth as follows:
\[ \text{Depth of Lake Segundo} = 0.56 \times \text{Depth of Lake Profondo} \] \[ \text{Depth of Lake Segundo} = 0.56 \times 84 \text{ feet} \] \[ \text{Depth of Lake Segundo} = 46.944 \text{ feet} \]
Now, since the elevation is below sea level, we represent the elevation at the bottom of Lake Segundo as a negative value:
\[ \text{Elevation at the bottom of Lake Segundo} = -46.944 \text{ feet} \]
Therefore, the elevation at the bottom of Lake Segundo is approximately -46.94 feet below sea level.