6-Un carpintero compra una escalera de 250 cm y en las instrucciones de uso dice que la posición más segura para ubicarla sobre la pared es cuando el pie de la escalera se encuentra a 60 cm de la pared. ¿Qué ángulo forma la escalera con el suelo?

Australia and New Zealand both produce wool and wine. Australia can either produce 200 litres of wine or 40 tonnes o wool per week. New Zealand can either produce 40 litres of wine or 10 tonnes of wool per week. Australia has an absolute advantage in the production of: A both wool and wine. B wine only. C wool only. D neither wool nor wine

21. South African firms purchase more capital goods from Europe. The \( \quad \) for Euros increases and rand in the rand/Euro exchange rate (4 marks)

Solve. \( 4 c^{3}-20 c^{2}=56 c \)

INVALSI 2016 Per frequentare una piscina si deve acquistare una tessera da \( € 10 \) e pagare \( € 7 \) per ogni ingresso. Luigi può spendere al massi- mo \( € 100 \). Se \( n \) indica il numero degli ingressi, quale tra le seguenti disequazioni descrive il nu- mero di ingressi che Luigi può effettuare? \( \begin{array}{ll}\text { A }(10+7) n \leq 100 & \text { C } 10+7 n \leq 100 \\ \text { B } 10 n+7 \leq 100 & \text { D } 10+7 n \geq 100\end{array} \)

In representing the "state," who else does the prosecutor represent? The Constitution The victim The defendant The people