Answer:
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A dozen people is 12. 5 people get off.
12 - 5 = 7
Answer 19:1
Work:
Students scoring above 80 -
9+18+72+15= 114
Students score exactly 80-
6
114/6 = 19
19 students scored above 80 for every 1 student that scored exactly 80.
3^6 power. it would be 3 to the 6th power
The answer to your question
is 12