Answer:
1000, 100; 20; 3
Step-by-step explanation:
I am supposing that you are asking about the sequence in your problems.
The initial sequence is one where the common ratio is 1/10. This means that on each term, you divide by 10 to get the next one. To fill in the gaps, you would do: 10000/10 = 1000, 1000/10 = 100.
The next one has a common ratio of 1/5. You divide each term by 5 to get the next one. 100/5 = 20, so that would be your next term.
The next one has a common ratio of 1/3. You divide each term by 3 to get the next one. 9/3 = 3.
