Answer :
[tex]\begin{gathered} 1a) \\ 8x23 \\ \text{She can double -double-double} \\ 8=2x2x2\text{ Hence} \\ 23x2=46 \\ 46x2=92 \\ 92x2=184 \\ 8x23=184 \\ 1c) \\ 8=4x2,\text{ th}\operatorname{erf}ore \\ 23x4=92 \\ 92x2=184,\text{ so} \\ 8x23=184 \end{gathered}[/tex]