tiempo que eso significa: ( 5 dias \( \times 4 \) semanas \( \times 10 \) meses \( \times 12 \) años. \( R=\ldots \ldots \ldots \) )

A sprinter runs around a 400 m running track twice (distance \( =800 \mathrm{~m} \) ). They start in lane 1 and finish in lane 1 (start and finish in the same position). They complete the run in 2 min 20 sec . Calculate their average velocity (not speed!) and include the unit \( (\mathrm{m} / \mathrm{s}) \) ?

\begin{tabular}{|l|l|}\hline Maths - Word Problems & I am thinkin \\ \hline\end{tabular}

7. If \( a=x^{2}+\frac{x}{3} \) \( z=6 x-2 \) What is a in terms of \( z \) ? A) \( \frac{z^{2}-4 z+8}{36} \) B) \( \frac{z^{2}-4 z+8}{12} \) C) \( \frac{z^{2}-6 z+8}{36} \) D) \( \frac{z^{2}-6 z+8}{12} \)

\( \lim _ { x \rightarrow 0 ^ { + } } \frac { \sqrt[ 3 ] { x \sin ^ { 2 } ( 2 x ) } ( \sqrt { x } - 1 ) } { e ^ { x } - \cos ( 3 x ) } \)

3.2 ข้อมูลชุดหนึ่งมีค่าเป็น \( 2,7, x, x, 10,17 \) ค่าเฉลี่ยเลขคณิตเท่ากับ 8 แล้ว \( x \) มีค่าเท่าใด