Даны два куска с различным содиржаниям олова.Первый массой 300г содержит 20% олова.Второй массой 200г содержит 40% олова.Сколько процентов олова будет содержать сплав,полученный из этих кусков?решите задачу плиззз*

за одну тренировку легкоатлет расходует 3800 кДж энергии.Какое количество углеводов или жиров пищи может компенсировать этот расход энергии

Помогите пожалуйста вставить местоимения (someone (somebody), anyone (anybody), something, anything, nobody (no one), nothing, somewhere, anywhere, nowhere.)

1. It's too dark here. I can't see ... . 2. Can I do ... for you? 3. They went... at all during the holiday. 4. It was very disappointing. Absolutely ... happened. 5. I want to tell you ... . 6. Did you turn the oven off? I think I can smell... burning. 7. It was quiet in the room.... said anything. 8. Has ... seen Paul today? 9. Was there ... interesting in the pa­per yesterday? 10. ... likes to stay in town on a hot day. 11. Everyone was listening to the guide. ... said anything.

12. Speak louder. I don't hear .... 13. Is ... going to see the house today? 14. Are you going ... today? - No, I am not going... today. I am too tired. 15.... understood the rule and the teacher had to explain it again. 16. I know ... at all. 17.1 can't add ... to what I've said. 18. There is ... waiting for you in the lobby. 19.1 don't want... to eat. 20. He looked at my pictures but didn't say .... 21. The accident looked serious. Fortunately ... was injured. 22. That's a very easy question. ... can answer it. 23. There is ... interesting at his exhibition. 24.1 don't think there is ... in the office. 25.1 am bored. I'd like to go ... tonight. 26.1 left the house without saying ... to her. 27. He's lazy. He never does .... 28. She's standing over there, near the bookshop. I think she is waiting for ... - 29.1 can't find my watch .... I've looked all over the house. 30. The bus was completely empty. There wasn't... on it. 31. It's a stupid idea. Ask ... and they will tell you. 32.1 don't know ... who speaks Chinese.