Answer:
Step-by-step explanation:
1,
-10,20,-40,80,...
common ratio=20/-10=-2
it is a geometric sequence.
2.
15,-5,-25,-45
common difference=-5-15=-20
it is an arithmetic sequence.
Answer: 101000
Step-by-step explanation: It would be rounded to 101000 because the nearest 100 would be a 1000.
Answer: B