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A-45.

Sam read $75$ pages of a new mystery novel in $2$ hours.

1. Is this a proportional situation?

2. If the book contains $350$ pages and he always reads at the same rate, how long will it take him to the read the entire novel?

Set up a proportion problem, with x as the time it will take to read the whole book.

$\frac{75}{2}=\frac{350}{x}$