1team won 10 gomes out of 16 of their games during the 2009 rogy ow many games do they need to play to win 50 games?

\( \sum _ { k = 1 } ^ { 4 } c \)

Eurekal Numeri nell'orto Un agricoltore de- cide di suddividere in questo modo il proprio terreno: \( \frac{3}{5} \) seminato a grano; del rimanente, il \( 35 \% \) seminato a mais e il \( 45 \% \) a erba medica. residui \( 1800 \mathrm{~m}^{2} \) verranno utilizzati per l'orta. Qual è, in \( \mathrm{m}^{2} \), la superficie totale del terrenocol- tivabile? E quella seminata a erba medica? [22500 \( \mathrm{m}^{2} ; 4050 \mathrm{~m} \) ?

tablet, IVA inclusa, è pari a \( 145 € \) e l'aliquota dell'IVA è pari al \( 22 \% \), a quanto ammonta il prezzo del tablet, IVA esclusa?

2. A study is done to determine if Company A retains its workers longer than Company B. It is believed that Company A has a higher retention than Company B. The study finds that in a sample of 11 workers at Company A their average time with the company is four years with a population standard deviation of 1.5 years. A sample of 9 workers at Company B finds that the average time with the company was 3.5 years with a population standard deviation of 1 year. Test this proposition at the \( 1 \% \) level of significance. Use critical value approach.

6. Determine \( o \) angulo entre as seguintes retas: \[ r_{1}:\left\{\begin{array}{c}y=-2 x+3 \\ z=x-2\end{array} \text { e } r_{2}: y=\frac{z+1}{-1} ; x=4\right. \]