Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapters 1-5 - Cumulative Review Exercises - Page 379: 32

Answer

$2$ cards

Work Step by Step

In India you pay $0.106$ dollars per minute. So a $20$ dollar card have $\frac{20}{0.106} = 189$ minutes. $1$ hour have $60$ minutes then $6$ hours have $6*60 = 360$ minutes. You will need $\frac{360}{189} = 2$ cards approximately.
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