Answer:
dont know
Step-by-step explanation:
dont know
27 has to be C
I can't see the whole question for 28 and 29
If only + numbers are acceptable, then the numbers divisible by 810 are represented by {810n}, where n = {0, 1, 2, 3, ... }
ANSWER

EXPLANATION
The problem represents a geometric progression.
The general form of a geometric sequence is:

where a = first term
r = common ratio
The first term from the table is the first price (for the first month). That is $80.00
To find the common ratio, we divide a term by its preceeding term.
Let us divide the price of the second month from the first.
We have:

The price after the 8th month is the value of a(n) when n = 8
So, we have that: