Answer:
$159.985 that is the answer i got by using this equation
![21\left(1-0.0858\right)(100)/(12)](https://img.qammunity.org/2021/formulas/mathematics/college/yksxbxug3vky4107sgkqyf8a0ectjvytbu.png)
$159985 using this equation
![21000\left(1-0.0858\right)(100)/(12)](https://img.qammunity.org/2021/formulas/mathematics/college/i7q2xyixam7ig2r71tv45af7re2crhbm8i.png)
$9944.03786 using this equation
![21000\left(1-0.0858\right)^{(100)/(12)}](https://img.qammunity.org/2021/formulas/mathematics/college/sisali6k3pfj3vljbg7abld5sj1lxqeta3.png)
$9.94403 using this equation
![21\left(1-0.0858\right)^{(100)/(12)}](https://img.qammunity.org/2021/formulas/mathematics/college/89t2bpg2i6luz4s33s179xyes5fcc6yhek.png)
Explanation:
I couldnt quite understand the equation, so i done it multiple ways. Hope this helps