Answer
$8000000$
Work Step by Step
The first number has 8 choices. The other 6 have 10 choices.
By the fundamental counting principle,
$8*10^6=8000000$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 9, Counting and Probability - Section 9.1 - Counting - 9.1 Exercises - Page 656: 21
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