How long will it take for a 7.72 lb boneless prime rib to cook med?

Cooking time for a 7.72 lb boneless prime rib to cook medium will depend on the oven temperature and the desired internal temperature. Here is a general guideline for cooking a boneless prime rib at 350°F (177°C):

Cooking time: 18-22 minutes per pound

Internal temperature for medium: 140-145°F (60-63°C)

Using this guideline, a 7.72 lb boneless prime rib will take approximately 139-170 minutes to reach medium doneness. It's important to use a meat thermometer to accurately measure the internal temperature and ensure it reaches the desired doneness. Please note that cooking times may vary depending on the specific cut of meat and oven conditions, so it's always a good idea to monitor the cooking process and adjust the time as needed.