let's check how much is it after 2 years firstly.

Brian invested the money for 6 years, so now let's check how much is that for the remaining 4 years.


Your answer is gonna be C
27
18
----
45
GCF of 45 = 15
Here is a word document on Greatest Common Factors and how to solve it.
You could rewrite

as

and be tempted to cancel out the factors of

. But this cancellation is only valid when

.
When

, you end up with the indeterminate form

, which is why

is not a zero.
Answer:
66
Step-by-step explanation:
