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

8,100

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.

Answer 2

`\$8,100`

Explanation:

We can denote this increase with the function
`y=3^x\cdot 100`, where
`y` is value after
`(x)/(9)` years.

Substituting
`x=36`, we get:

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