Graph b would be my guess!
The answer would be 167 I believe
7.309
The thousandth is third number to the right of the decimal. We round 5+ up and 4- we round down.
So we round the decimal into third place, the fourth place is the 7 so we round that up, and we get 7.309

The polynomial cannot be factored with rational numbers due to b being 5. You can factor it if b is equal to 6.
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