Option C
Olivia paid $ 15683.28 after 8 years
Solution:
Given that Olivia decides to buy the furniture on credit with 9.5% interest compound quarterly
She spent $ 7400
To find: total amount paid after 8 years
The formula for amount using compound interest is given as:
![A=p\left(1+(r)/(n)\right)^(n t)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/bwri47o3lmnw85exn92ahsoc9rb4izkyqa.png)
Where,
"p" is the principal amount
"r" is the annual interest rate in decimal
"t" is the time the money is invested or borrowed for
"n" is the number of times that interest is compounded per unit t
Here in this problem,
p = $ 7400
![r = 9.5 \% = (9.5)/(100)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/grxhrz1uxsfkhew8gip0h9o4u7mtk36wmj.png)
t = 8 years
n = 4 (since interest is compounded quartely)
Substituting the values in given formula,
![A=7400\left(1+(9.5)/(100 * 4)\right)^(4 * 8)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/q6kg5ock2jxy2x1iz4ao3fh54agwro5dcv.png)
![A=7400(1+0.02375)^(32)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/y6e88fu34ptosv88u2nzadhfr2kq9eo166.png)
![A=7400(1.02375)^(32)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/f49oqp72o1ti8myjthdqd9yvmf8szx6awq.png)
![\begin{array}{l}{A=7400 * 2.11936263142} \\\\ {A=15683.28}\end{array}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/m8jhhpwn4e0ha63eipb9t3odbtyup0m63h.png)
Thus the total amount she paid after 8 years is $ 15,683.28