1. The ratio of one day to two hours is expressing to the lowest term is 2. The fraction form of the percentage \( 7.8 \% \) is 3. A student scored 16 out of 25 in mathematics test. The student's score in percent is 4. If \( 3 x: 4 x=6: x \), is in proportion. Then the value of \( x \) is 5. Last year Abeba's salary was 500 birr. If he gets a \( 20 \% \) increment this year, His present salary is 6. 45 seconds as a percentage of 5 minutes is expressed as: 7. A man buys a washing machine whose price VAT is 175 birr. Its VAT is charged at 150

мил. каждом соединении. 3. Запишите формулы оксидов углерода(II) и (IV), Рассчитайте массовые доли ментов в них и дайте названия соединений. 4. Назовите вещества, формулы которых: \( \mathrm{PCl}_{3}, \mathrm{SO}_{2}, \mathrm{CS}_{2}, \mathrm{Cu}_{2} \mathrm{O}, \mathrm{KCl}_{3}, \mathrm{SO}_{3} \).

\( 7 \frac { l ^ { \circ } } { 4 } \operatorname { ctan } \times 10 = \)

If the exchange rale rale is \( E 1=R 8,1671 \) and \( E 1= \) h 12,1668 . Determine the exchorgt rale beperen the ears and the pound.

\( 3 x^{3} y-5 x y^{3}+3 x^{4}-x^{4} \) entre \( x^{2} 2 x y+x^{2} \)

Вычисли площадь и сторону квадрата, если диагональ квадрата равна \( 6 \sqrt{2} \) дм. Сторона квадрата равна \( \square д м \). Площадь квадрата равна \( \square д \) \( ^{2} \). (Если необходимо, ответ округли до сотых.)