Предмет: Математика, автор: Аноним

Дан радиус шара а)4см б)0,2дм в) 1/2м г)1 1/3
1) Вычислить объем шара
2)вычислить площадь поверхности шара

Ответы

Автор ответа: Ирасик
0
1) Объем шара вычисляют по формуле V=  frac{4}{3}  π r³
если r=4 см, то V=4/3 · π · 64 = 256/3 π (см³)
если r=0,2 дм, то V = 4/3 · π · 0,008 = 4/375 π (см³)
если r=1/2 м, то V = 4/3 · π · 1/8 = 1/6 π (см³)
если r=11/3, то V = 4/3 · π · 1331/27 = 5324/81 π

2) Площадь поверхности шара находят по формуле S = 4πr²
если r=4 см, то S = 4 · π · 16 = 64 π (см²)
если r=0,2 дм, то S = 4 · π · 0,04 = 0,16 π (см²)
если r=1/2 м, то S = 4 · π · 1/4 = π (см²)
если r=11/3, то S = 4 · π · 121/9 = 484/9 π
Автор ответа: Ирасик
0
Спасибо за "лучший ответ"!!!!!!!!!!!
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My favourite book is “Robinson Crusoe” by Daniel Defoe. D. Defoe (1660-1731) was a great master of realistic detail. The novel “Robinson Crusoe” was written in 1719. The novel is praise to human labour and the triumph of man over nature. Defoe shows the development of his hero. At the beginning of the story we see an unexperienced youth, a rather frivolous boy, who then becomes a strong-willed man.
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Defoe is a writer of the Enlightenment. He teaches people how to live, he tries to teach what’s good and what’s bad.
His novel “Robinson Crusoe” is not only a work of fiction, an account of adventures, a biography and an educational pamphlet. It is a study of man, a great work showing man in relation to nature and civilization as well as in relation to labour and private property

Answer the questions. Give short answers. Ответьте на вопросы кратко.
Who wrote the novel “Robinson Crusoe”?
What does the writer teach people?
When was the novel written?
Is Robinson Crusoe a work of fiction?
What is Robinson Crusoe’s most characteristic trait?
What are Robinson Crusoe’s guiding principles in life?
What kind of man was Crusoe?