Notice that:
[tex]\begin{gathered} 0\leq\sqrt[]{x}<3 \\ \Rightarrow \\ 0\leq x<9 \end{gathered}[/tex]The set of solutions for the inequality consists of all real numbers less than 9 and greater or equal to zero.
The numbers that fullfill that requirement are:
7 and 8
Answer: 8 and 9