Коля узнал,что 45 больших деревьев растущих в лесу выделяют в сутки столько кислорода,сколько его нужно для дыхания 90 третьеклассников.В большом городе много загрязняющих его газов и эти же деревья выделяют там в 10 раз меньше кислорода.Сколько нужно таких деревьев посадить Коле во дворе московской школы,чтобы они выделяли в сутки такое количество кислорода,которого бы хватило для дыхания 25 учеников Колиного класса?

Характеристика Яремы з поемы Гайдамаки
помогите...пожалуйста!!!очень нужно!! 

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Joe and Dan's spaceship hit the ground.
The two astronauts didn't move. There was
somebody in the spaceship with them
It was a woman. Her strange yellow eyes shone
in the dark.
'Put these men in the conversion room!' said the
woman to her guards.
The guards had Yellow eyes too.

Dan opened his eyes. Joe was awake.
'Where are we?' asked Dan.
'We're somewhere in space, I think,'
answered Joe.
'Have you seen anybody yet?' asked Dan.
'No, I haven't,' said Joe. ;But what's that?
I can hear something.'

The door opened. The woman with the
strange yellow eyes came into the room.
'Welcome to Kitra!' she said. 'I am Azdie,
the ruler of this planet. Nobody on your
planet knows about Kitra because it's
a long way away. We captured your
friends from Spaceship Zeus.
We have changed them into Kitrans.
Now they're going to help us to
conquer the Earth,; Azide smiled.
'And you will help us too!'
'Never!' shouted Joee.
Dan jumped up and threw his space jacket
over Azdie's head. Joe tied her to a chair.

At that moment there was a ringing noise.
'It's the alarm!' said Dan. 'What are we ging
to do now?"

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