Answer:
Susie has 1500 songs and 400 books
Explanation:
We divide 9,000 MB by 6 MB and get 1500. Susie has 1500 songs.
Then we convert 0.4 GB to MB. If 1000 MB is equal to 1 GB, we have to multiply 0.4 by 1000. We get 400. Susie's books take up 400 MB of space.
We divide 400 by 1 to find out how many books she has. Susie has 400 books.