
The formula of the sum of a geometric sequence:

We have:

substitute:

Answer: C. -5460
Answer:
16
Step-by-step explanation:
17-9=8
8*2=16
Because had 8 but bought 9 more to where he then had 17 but if you take 8 times 2 then your answer is 16 and that's how many comic books he began with.
Hope this helps
3h
The set cost is 25, because c=25 when h=0. So, this leaves 3h as the hourly rate.