A 5.17 pound roast should cook for 118.9 minutes based on a 325 °F oven setting.
According to the question, we have the information that one pound of beef rib roast should cook for 23.0 minutes.
Following this information;
1 pound of beef rib roast cooks for 23.0 minutes
5.17 pound roast cooks for 5.17 pound * 23.0 minutes/1 pound
Therefore, 5.17 pound roast cooks for 118.9 minutes.
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