Question 1140297
.
<pre>
Notice that the original deposit of 100 dollars triples in 2 years till 300 dollars.


It will triples further every 2 years.


Also notice that  {{{24300/300}}} = {{{243/3}}} = 81 = {{{3^4}}}.


It means that after getting $300, this account needs four 2-years periods to grow in {{{3^4}}} times.


Starting from $300, after 2 years the account will be $900.


After another 2 years, the account will be  $2700.


After another 2 years, the account will be $8100.


Finally, after another 2 years, the account will grow to $24300.


<U>ANSWER</U>.  In 8 years, the amount at the account will grow in 81 = {{{3^4}}} times from $300 to $24300.
</pre>

Solved, answered, explained and completed.