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13.5 Exercise 61

Avg difficulty 2.5

The set, S S consists of 900,000,000 \text{900},\text{000},\text{000} whole numbers, each being the same number of digits long. How many digits long is a number from S? S ? (Hint: use the fact that a whole number cannot start with the digit 0.)

OpenStax Algebra and Trigonometry 2e, 13.5 Counting Principles, exercise 61

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Adapted from College Algebra © 2021 Rice University. Licensed under CC BY 4.0. Sources: College Algebra 2e, Algebra and Trigonometry 2e, Precalculus 2e, College Algebra with Corequisite Support 2e. Imported at revision 4922e46.