I believe it’s 10
Explanation : Simplify the radical by breaking the radicand up into a product of known factors, assuming positive real numbers.
Answer:
-5
Step-by-step explanation:

1/7 gallon = 1 batch
<em>[multiply by 7 through]</em>
1 gallon = 7 batches
<em>[multiply by 8/9 through]</em>
8/9 gallon = 7 x 8/9
8/9 gallon = 6 2/9
<em>[Good enough to make 6 batches, not enough to make 7 batches]</em>
So he can make 6 batches of collard green
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The answer to the nearest tenth is 34.2