Answer:
1.Buck saves Thornton's life
2.Buck wins $1,600 for Thornton.
3.Thornton looks for a lost mine.
4.The men find gold.
5.Buck spends time alone in the forest.
Explanation:
Margie was performing badly in geography since the mechanical teacher was updated with higher level of geography. Since the level was higher than her standard, she could not catch up with the lessons as it was too advanced.
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It means conditions that are on the margin, the margin being that region of the operational envelope that is right on the edge between acceptable and unacceptable.