Answer:
[tex]5,789[/tex]
Step-by-step explanation:
we know that
When numbering the pages of a book, which has 1,724 pages, we need:
9 one-digit numbers (from 1 - 9)
90 two-digit numbers (from 10 - 99)
900 three-digit numbers (from 100 - 999)
725 four-digit numbers (from 1,000 - 1,724)
Multiply each value by the number of digits
so
[tex]9(1)+90(2)+900(3)+725(4)[/tex]
[tex]9+180+2,700+2,900[/tex]
[tex]5,789\ digits[/tex]
