Çözüldü Saving Account Increase via Exponential Function

Money in a bank triples every 8 years. If $100 is deposited today, what will its value be after 32 years?

A) $8,500
B) $8,400
C) $8,300
D) $8,200
E) $8,100

[ 3^(32 / 8) ]·$100 = $8,100.

Original Solution:
In 8 years the value will be 3 × 100 = 300. Eight years later (after a total of 16 years), the value will be 3 × 300 = 900. Eight years after that (after a total of 24 years) the value will be 3 × 900 = 2700. And eight years after that (after a total of 32 years) the value will be
3 × 2700 = 8100.
https://www.etown.edu/depts/math/files/PracticePreCalculus.pdf
(Question 1 with different choices)