\begin{tabular}{l}\( 7 \times 538 \) \\ nswer the questions below. \\ \( \begin{array}{l}\text { (a) Rachel estimates this product by computing } 7 \times 500 \text {. } \\ \text { What is her estimate? } \\ 7 \times 500=\square \\ \text { (b) Brian estimates this product by computing } 7 \times 600 \text {. } \\ \text { What is his estimate? } \\ 7 \times 600=\square \\ \text { (c) Whose estimate is closer to } 7 \times 538 \text { ? } \\ 0 \text { Rachel's estimate is closer } \\ \text { Brian's estimate is closer } \\ \text { Their estimates are equally close }\end{array} \) \\ \hline\end{tabular}