Answer:
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Step-by-step explanation:

Therefore it's geometric sequence with common ratio of 6

It's C. Number of students who scored "proficient" on chapter 7 is 16, and of those, only 3 scored "needs improvement" on 6. So the 3/16 represents those who were proficient at 7, but need improvement on 6
It can't be timing or cost since it is only a few people , i chose bias because a few people is actually 7 - 8 people
7 * 9 = 63
add four 0's from 700 and 900
630,000
8p-8=-9(2p+5)-9(6-3p)
p=91
I showed the work up there and checked