The final amount left in her bank account=$643.2
Answer: Option(b)
Given:
Principle P=$600
Rate r= 1.2%
Time t= 6 years
To find:
Amount left in her account
<u>Step by Step Explanation:
</u>
Solution;
Formula used for calculating Amount is given as

Where P=Principal Amount invested
SI=Simple Interest
And also formula used for calculating Simple Interest is

Where P=Principal Amount
N=No of years
R=Rate of interest
Substitute this equation in the above main equation we get

![\text { Amount }=P+\left[\frac{P N R}{100}\right]](https://tex.z-dn.net/?f=%5Ctext%20%7B%20Amount%20%7D%3DP%2B%5Cleft%5B%5Cfrac%7BP%20N%20R%7D%7B100%7D%5Cright%5D)
![=600+\left[\frac{600 \times 1.2 \times 6}{100}\right]](https://tex.z-dn.net/?f=%3D600%2B%5Cleft%5B%5Cfrac%7B600%20%5Ctimes%201.2%20%5Ctimes%206%7D%7B100%7D%5Cright%5D)
= 600 + 43.2 = 643.20
Result:
Thus the final amount left in her bank account at the end of 6 years is $643.2