Answer:
4 + 12 + 36 + ...
Step-by-step explanation:
4, 12, 36, ... is a geometric sequence, it has a common ratio of 
When we add the terms of a geometric sequence we get a geometric series.
4+12+36+ ... is a geometric series, it has a common ratio of 
4 + 12 + 20 + ... is not a geometric series because it has no common ratio

The second choice is correct
T has 4 times what R has, so 2.105*4 which is 8.42
The answer is D 105 because i know
You can fill up 4 tanks because 20 divided by 5 is 4
The answer to the question