Question

Money in a bank triples every 9 years. If $100 is deposited today, what will it's value be after 36 years?

Answer 1

Answer:

$\ 8,100$

Step-by-step explanation:

We can denote this increase with the function $y=3^x\cdot 100$, where $y$ is value after $\frac{x}{9}$ years.

Substituting $x=36$, we get:

$3^4\cdot 100=\boxed{\ 8,100}$

Answer 2

Answer:

8,100

Step-by-step explanation:

The first 9 years would be 300, then 18 years would be 900, and 27 years it would be 2,700, and finally after 36 years it would be 8,100.