College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter P, Prerequisites - Section P.9 - Modeling with Equations - P.9 Exercises - Page 72: 52

Answer

$\approx3.06g$

Work Step by Step

Currently there is $100\cdot0.02=2g$ of bleach and the optimal is $5g$ of bleach, thus if we drain $x$ out of the 100g and replace it with bleach, the concentration of bleach will be: $\frac{2-0.02x+x}{100}=0.05\\2+0.98x=5\\0.98x=3\\x\approx3.06g$
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