Metric system: A certain CD-ROM disk can store 600 megabytes of information. If an average word requires 9.0 bytes of storage, how many words can be stored on one disk?
A. 6.7 × 107 words
B. 5.4 × 109 words
C. 2.1 × 107 words
D. 2.0 × 109 words
Answer: A
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