Answer
$\approx3.8\times 10^{9}$ times
Work Step by Step
$80\displaystyle \frac{times}{minute}*\frac{60 minutes}{hour}*\frac{24 hours}{day}*\frac{365 days}{year}*90 years\approx 3.8\times 10^{9}$ times
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 P, Prerequisites - Chapter P Review - Exercises - Page 77: 50
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