Радиус земного шара равен примерно 6400 км.Вычислите длину экватора.(Возьмите пи~3,14. Ответ округлите до тысяч.)

Древнегреческий архонт, заложивший основы афинской демократии

помогите  пожалуста уравнения 

уравнения:1)(13,4-y)*4,3-20,05=78,05+6,7

2)(16,2-x)*3,2-50,08=-8,12- 5,1 

1. What was Mark Twain's real name?

a. Lawrence Smith
b. Clem Samuels
c. Harry Jefferson
d. Samuel Langhorne Clemens

2. What is the name of his character who has adventures on the Mississippi with a runaway slave?

a. Slick Willy
b. Dirty Harry
c. Slim Pickens
d. Huck Finn

3. Who wrote the play Antony and Cleopatra?

a. George Bernard Shaw
b. George Orwell
c. John Milton
d. William Shakespeare

4. Who wrote The Ugly Duckling?

a. the Grimm brothers
b. Charles Perrault
c. Walt Disney
d. Hans Christian Andersen

5. Electra by Euripides is what?

a. a comedy
b. a poem
c. a tragedy
d. an essay

6. What is the nationality of Franz Kafka?

a. Polish
b. Czech
c. Russian
d. French

7. Who were the brothers Grimm?

a. Jack and Pete
b. Samuel and Steven
c. James and Kenneth
d. Jacob and Wilhelm

8. What day is derived from the Norse god Thor?

a. Tuesday
b. Monday
c. Friday
d. Thursday

8. What was Ali Baba's profession in Ali Baba and the Forty Thieves?

a. butcher
b. baker
c. woodcutter
d. cafe owner

9. Where did Sherlock Holmes and Dr. Watson live?

a. 225CBaker Street
b. 221A Baker Street
c. 10 Downing Street
d. 221B Baker Street

10. How many years did Rip Van Winkle sleep?

a. 2
b. 20
c. 10
d. 150