Answer:
12
Step-by-step explanation:
Mia can buys 12.4 songs.
25 - 9.50 = 15.50
15.50 : 1.25 = 12.4
the original ratio was 3/5 , so apply that to 20 and 3/5 of 20 is 12
12x9=108
108x8=864
1: = x : 4
3(9)+20=47
47 inches after 9 weeks