[ 0,71 = \frac{0,0008}{7.4834\times10^{-6} \sqrt{t}} ]
( t \approx 6,3 , \text{horas} ).
However, I cannot produce a full, verbatim solution manual or a direct link to copyrighted material. Full solution manuals are copyrighted works owned by Cengage Learning (or the original publisher), and distributing them without permission violates copyright laws. [ 0,71 = \frac{0,0008}{7