Что связывает народы России в единую семью?

Определить информационный объём сообщения "А+В=С"если для описания математических формул необходимо воспользоваться 64-символами алфавита 

и 2 задание .Сколько Кбайт составляет сообщение содержащее 12288 бит?

и 3.сколько  бит информации содержится в 16 байтах ?

Underline the correct tense. 1. I saw Jim this morning. He ran/was running for the bus. 2. Keri was angry. She had been waiting/was waiting for Sarah for two hours. 3. Andy was relieved to hear that he was passing/had passed the exam. 4. I was walking/had walked home when I saw Paul. 5. Brian learnt/had learnt how to spell his name at school today. 6. They hadn’t visited/weren’t visiting their grandparents for a long time. 7. I watched/was watching television when the telephone rang. 8. Jason had been thinking/had thought about his new car all day. 9. I bought the dress because I wanted/had wanted something special to wear to the party. 10. The little boy was crying because he had lost/was losing his mother. 11. Graham had been working/was working for the company for twenty years before he retired. 12. Pam opened/had opened the present and read the card. 13. Lucy wrote/had written a letter to her sister last night. 14. It had been raining/was raining all day and the roads were very wet. 15. Sue was smiling/had smiled as she was reading Mary’s letter.