какие дроби используются чаще всего и почему

помогите найти рисунок ОБЪЕМА ПРОИЗВОЛЬНОЙ ФИГУРЫ ( простой, наглядный)

смешали 500г10% и 500г25% растворов одного вещества. Определить новую концентрацию раствора

не понимаю квадратные корни,объясните как решать

2√128 - √72

В Fill in the gaps in the conversation with your own phrases. You can also use phrases from the Conversation bricks.

Girl: Mom, I'd like to talk to you about the party tomorrow.

Mom: I think we've already discussed that and the answer is "No".

Girl: ...

Mom: What makes you think that you deserve to go?

Girl: ...

Mom: Well, that's all very nice, but I've already told you that you can't go this week. If you behave yourself, I'll let you go next time.

Girl: ...

Mom: Well, I really don't know. Go and ask your father then.

Girl: ...

Mom: ...You'll understand when you're older.