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5-78.

Janelle came to bat $464$ times in $131$ games. At this rate, how many times should she expect to have at bat in a full season of $162$ games?

Set up a proportion.

$\frac{\text{at bats}}{\text{games}} = \frac{464}{131} = \frac{x}{162}$

$464(162) = 131x$

$75168 = 131x$

$\frac{75168}{131} = x$

$573.8015=x$, so about $573$ or $574$ times.