Standard for means it is written in words: four hundred ans fifty would be the answer.
You want a summary of the book?
Answer:
A history book, a newspaper, etc.
Explanation:
Authors of informational text employ a variety of structures to assist the reader in finding information quickly and efficiently. These might include a table of contents, an index, bold or italicized text, glossaries for specialized vocabulary, embedded definitions for specialized vocabulary, realistic illustrations of photos, captions and other labels, and graphs and charts.