Answer:
0.00420
Step-by-step explanation:
Answer:
6:7
Step-by-step explanation:
divide both sides by 7...
Answer:
1000
Step-by-step explanation:
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20 Answer: a₁ = 4
<u>Step-by-step explanation:</u>

21 Answer: n = 13
<u>Step-by-step explanation:</u>

22 Answer: n = 5
<u>Step-by-step explanation:</u>
