\[\boxed{\text{374.}\text{\ }еуроки - ответы\ на\ пятёрку}\]
\[v = 331 + 0,6t\]
\[если\ t = - 35{^\circ}С:\]
\[v = 331 + 0,6 \cdot ( - 35) =\]
\[= 331 - 21 = 310\ \frac{м}{с}.\]
\[если\ t = 30{^\circ}С:\]
\[v = 331 + 0,6 \cdot 30 = 331 + 18 =\]
\[= 349\ \frac{м}{с}.\]
\[\boxed{\text{374\ (374).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\textbf{а)}\ 0,9 \cdot 0,9 \cdot 0,9 = {0,9}^{3}\]
\[\textbf{б)}\ ( - 6) \cdot ( - 6) \cdot ( - 6) \cdot ( - 6) =\]
\[= ( - 6)^{4}\]
\[\textbf{в)}\ \frac{1}{2} \cdot \frac{1}{2} \cdot \frac{1}{2} \cdot \frac{1}{2} = \left( \frac{1}{2} \right)^{4}\]
\[\textbf{г)}\ \underset{25\ раз}{\overset{5 \cdot 5 \cdot \ldots \cdot 5}{︸}} = 5^{25}\]
\[\textbf{д)}\ ccccccc = c^{7}\]
\[\textbf{е)}\ yyyyyyyyyyyy = y^{12}\]
\[\textbf{ж)}\ ( - x) \cdot ( - x) \cdot ( - x) \cdot ( - x) \cdot ( - x) =\]
\[= ( - x)^{5}\]
\[\textbf{з)}\ (a - b)(a - b) = (a - b)^{2}\]
\[\textbf{и)}\ \left( \text{xy} \right) \cdot \left( \text{xy} \right) \cdot \left( \text{xy} \right) \cdot \left( \text{xy} \right) \cdot \left( \text{xy} \right) =\]
\[= \left( \text{xy} \right)^{5}\]