Provide an Appropriate Response

Essay

Provide an appropriate response.
-What base is being used in a 3 -digit numeral having place values as depicted in the table. \begin{tabular} { l | l | l } 3rd position & 2nd position & 1st position \\ \hline sevens of sevens & sevens & ones \end{tabular}
$\begin{array}{l|l|l}\text { 3rd position } & \text { 2nd position } & \text { 1st position } \\\hline \text { sevens of sevens } & \text { sevens } & \text { ones }\end{array}$