Answer: 161.5 lbs
Explanation:
Given : The weight of 4 bushes of rye = 76 lb
By applying UNITARY METHOD, the weight of 1 bush will be :-

Now, the weight of 8.5 bushes =

The weight of 8.5 bushes = 161.5 lbs
Therefore, the weight of 8.5 bushels of rye= 161.5 lbs
Hence, the required answer is "161.5 lbs".