\[\boxed{\text{149\ (149).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\textbf{а)}\ x^{4} = 6;\ \ \ \]
\[x \approx \pm 1,6.\]
\[\textbf{б)}\ x^{4} = 8,5;\ \ \ \ \]
\[x \approx \pm 1,7.\]
\[\boxed{\text{149.}\text{\ }\text{ОК\ ГДЗ\ -\ домашка\ на\ 5}}\]
\[\textbf{а)}\ 1,5\ с;\ \ \ \]
\[\textbf{б)}\ 2,5\ с;\ \ \ \]
\[\textbf{в)}\ 31,25\ м;\ \ \ \ \]
\[\textbf{г)}\ 4\ с.\]