Your mothers temperature.
The internal temperature for roast duck should reach 160 to 165 degrees F.
3lb is equal to 3 pounds.
If you want medium roast, try 15 minutes a pound at 350. Test the temperature. You'll want about 145.
165
18st 3lb - 17st 13lb = 4lb. Therefore, the difference is 4 pounds.
Why would you "cook" a pork roast in the microwave. Pork roast are a tough meat and it requires low temp at about 10 hours like in a crock pot.
1 lb = 16 oz 16(oz) x 3(lb) = 48 oz 48oz = 48oz So the answer is no. 3lb is not greater than 48oz
Meat thermometer.
Cook to 170 degrees,
3lb
Cook it all day; crock pots don't really overcook anything.