Page:U.S. Government Printing Office Style Manual 2008.djvu/290

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o. Unit modifiers:


 * 5-day week
 * 8-year-old wine
 * 8-hour day
 * 10-foot pole
 * ½-inch pipe
 * 5-foot-wide entrance
 * 10-million-peso loan
 * a 5-percent increase
 * 20th-century progress

but
 * two-story house
 * five-member board
 * $20 million airfield

p. Vitamins:

B$12$, B$T$, A₁, etc.

When ordinals appear in juxtaposition and one of them is 10th or more, figures are used for such ordinal numbers.


 * This legislation was passed in the 1st session of the 102d Congress.
 * He served in the 9th and 10th Congresses.