Answer:
Option b. $7.68
Step-by-step explanation:
we know that
1) The music store is having a 15% off sale on all classical music cds
![100\%-15\%=85\%=85/100=0.85](https://tex.z-dn.net/?f=100%5C%25-15%5C%25%3D85%5C%25%3D85%2F100%3D0.85)
If the cd has a price of $23.99
then
The price with 15% off sale is equal to
![\$23.99(0.85)=\$20.39](https://tex.z-dn.net/?f=%5C%2423.99%280.85%29%3D%5C%2420.39)
2) Lyell has a coupon for 20% off any classical music cd.
![100\%-20\%=80\%=80/100=0.80](https://tex.z-dn.net/?f=100%5C%25-20%5C%25%3D80%5C%25%3D80%2F100%3D0.80)
If the cd with a 15% off sale has a price of $20.39
then
The price with a coupon for 20% off is equal to
![\$20.39(0.80)=\$16.31](https://tex.z-dn.net/?f=%5C%2420.39%280.80%29%3D%5C%2416.31)
<em>Find the difference between the original price and the final price</em>
![\$23.99-\$16.31=\$7.68](https://tex.z-dn.net/?f=%5C%2423.99-%5C%2416.31%3D%5C%247.68)