Answer
490 widgets
Work Step by Step
Since we count at the end of weekend,
and $\Delta w= -10 $,
Number of widgets on Monday morning $=500+\Delta w=500-10=490$.
College Physics (7th Edition)
by Wilson, Jerry D.; Buffa, Anthony J.; Lou, Bo
Published by
Pearson
ISBN 10:
0-32160-183-1
ISBN 13:
978-0-32160-183-4
Appendix I - A Symbols, Arithmetic Operations, Exponents, and Scientific Notation - Commonly Used Symbols in Relationships - Appendix I-A Exercises on Symbol Usage - Page A-1: 3
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