Ответ по предмету Геометрия: Построй окружность с центром в точке О(-3;4) и радиусом 4. Запиши уравнение этой окружности.

Предмет: Беларуская мова, автор: kovalevskijivan945

159. Пастаўце патрэбныя знакі прыпынку. Падкрэсліце адасобленыя акалічнасцi. 1. Раніцамі плавалі над свежай зямлёй туманы рассыпаючы на траве бры- льянтавыя пацеркі расы. 2. Над галавой напоўніўшы паветра шумным свістам крылаў праляцелі качкі. 3. Вучні адказваюць на пытанні стоячы. 4. Цалюткі дзень бегаеш па вуліцы язык высалапіўшы. 5. Імкліва і булькаючы выбягала довак калiйнай солi на ўсёй нашай планеце. 7. У вёсцы нягледзячы на позні крынічка. 6. Паводле сцверджання геолагаў Салігорск адна з багацейшых кла- час чуваць былі песні дзяўчат. 85

1 год назад

Предмет: Информатика, автор: Аноним

ХЕЛП ХЕЛП УМОЛЧЮ ПОМОГИТЕ

1 год назад

Предмет: Английский язык, автор: profproduct

write a short summary of this article:
We need communication. Communication keeps businesses and factories
running. It helps people in trouble to contact police, fire departments, ambulances
and doctors. Our armies would be useless, and our government would not work
without it. We would lose contact with our families and friends that live far away.
There would be no radio or television stations to entertain us, or films to see.
The word 'telecommunication' comes from Greek and means 'communication
at distance'. Now it is a general term for systems or technologies that are used in
sending and receiving messages over a distance electronically. Mobile and satellite
phones, radio, television and networks are a few examples of telecommunication.
It all began with primitive and even ancient forms of telecommunication. There
was a time when people painted on the walls of caves and canyons to tell the story of
their culture. But real communication began with language. Story-telling was used
to tell stories before there were books. Although, there were forms of long-distance
communication not based on words: smoke signals used by American Indians, fires
which usually meant 'danger' or 'victory' or drums in the jungles of Africa and Asia.
Ancient Egypt was the first country where birds - domesticated pigeons were used
for sending messages. Genghis Khan saw their potential and pigeons carried news
of each new victory to his homeland in Mongolia. Ship's flags and semaphores
mechanical devices on towers - were other forms of telecommunication.
The true 'jump' came with the electricity leading to the telegraph and signal
lamps. In 1843 Samuel Morse proposed a way to give every letter and number
a special code (point, line and space). It was Morse's Symbol code, which we can
still find being used today.
Seven years later, Antonio Meucci and Graham Bell independently managed to
build an early telephone. Since Meucci didn't have the money to patent the invention
(the cost was $250 at the time), it was Bell who managed to register it first.
Many other innovations were soon to come: in 1895 Guglielmo Marconi invented
the 'wireless telegraph' - radio. Alexander Popov from Russia whose invention of
the radio came before Marconi's, did not patent it.
In 1923, the television was invented, in 1947 the invention of transistors gave
birth to the field of electronics, in 1969 the first microprocessor was invented. The
rest of the story is widely known: in 1983, the military project Arpanet became
available to universities and research centres, which finally gave birth to the Internet.
Email began to take place of snail mail. the 20th century, telecommunications also reached beyond our planet.
Radio waves have already travelled to the planet of Neptune and back. In the 21st
century, we can talk to anyone in any part of the world using a telephone. NASA's
newest telescope is working at a distance of 1 million miles from Earth. In short,
telecommunication has come a long way from cave paintings and smoke signals.
Maybe someday, we will have a mental connection with things so all we have
to do is think, and it is done... or, computers will be able to visually connect with anyone in the world, without cameras... Only the future will tell... after all, hundreds
of years ago no one would have dreamed of all the things we have today.

Choose words fromthe list below:
communication, channel, device, mass media, means, network, portable, receive, remote, source, successful, technology

1 год назад

Предмет: Математика, автор: abylovbeka2

-2,63×(37-56,84)+4,21×(4-2,73)

6 лет назад

Предмет: Литература, автор: COBYLIA

О.Генри Дары волхвов сверху фото задания, пожалуста, очень очень срочно! даю 10 балов

6 лет назад

Построй окружность с центром в точке О(-3;4) и радиусом 4. Запиши уравнение этой окружности.

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