SOLUTION
The dolphin travelled a total of 31 meters.
Every second, the dolphin travelled 16% of 31 meters which is
[tex]\begin{gathered} \frac{16}{100}\times31\text{ meters } \\ =4.96\text{ meters} \end{gathered}[/tex]After 3 seconds, the dolphin will travel
[tex]\begin{gathered} 3\times4.96 \\ =14.88\text{ meters} \end{gathered}[/tex]Therefore, the answer is 14.88 meters