длина радиуса каждого круга равна Х дм(4 круга).Какова длина и ширина прямоугольника в котором они находятся?

о чем меня заставили задуматься рассказы чехова

Change the following sentences into Passive Voice:

1.They are building a bridge here.

2.They didn't inform us.

3.She looks after the children very well.

4.People must wear ties in this club.

5.They make a new film every year in this studio.

6.He didn't introduce me to his mother.

7.They will meet you at the terminal.

8.You may not use dictionaries during the examination.

9.A big truck knocked him down last Monday.

10.they are renovating the castle at the moment.

Определите массовую долю соли в растворе, полученном при добавлении 5г соли к 45г раствора с массовой долей этой же соли равной 10 %