Answer:
25 CD's should cost $125
Step-by-step explanation:
We can use ratios to solve this problem. Put cost over number of CD's
$25 $ x
---------- = -----------
3 15
Using cross products
25*15 = 3x
Divide by 3
25*15/3 = 3x/3
125 =x
25 CD's should cost $125
