Предмет: Математика, автор: baguvixer

помогите позже прошу сделать 160 161

Приложения:

Chernikov10: ручка 2 рубля?

baguvixer: нет

Chernikov10: сколько?

baguvixer: 1000

baguvixer: ну решай

baguvixer: прошу

Ответы

Автор ответа: Andrey1977

1

32-14=18 руб. стоит 2 бублика
18:2=9 руб. стоит 1 бублик

50-18=32 руб. стоит 4 конфеты Гулливер
32:4=8 руб. стоит 1 конфета
18-8=10 руб. стоит 1 шоколадка
10:8=1,25 раза шоколадка дороже конфеты

Andrey1977: 92-12=80р стоят четыре тетради

80/4=20руб стоит одна тетрадь

20-12=8руб на столько дороже тетрадь

baguvixer: нет

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The PSTN (the public switched telephone networks) we have been describing has a star configuration. Local loops (usually one per subscriber) terminate in a CO (central-office). This CO completes connections from one local loop to another local loop or from one local loop to a trunk that terminates on some other CO. This CO has gone through a number of fundamental technological changes. The manual system required, of course, constant attention from operators. In the late 1800s, telephone calls were connected manually at the CO. When a call came in, an attendant would plug into a horizontal bar line. He then would yell to the operator who handled the customer being called, and that second operator would connect to the bar and finish setting up the call. When the call was completed, another operator would yell to all in the room that the line was clear again. The step – by – step system, which is still in operation in many parts of country, utilized that is known as the Stronger switch. The intelligence in the system was located in relays mounted on each switch. The switch itself responded to the dial pulses of the rotary dial.

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When electronics came along, the electromechanical control of the common control system was replaced with electronics, and the network, or matrix, was usually replaced with tiny glass – encapsulated reed switches. Hence, only a part of the switch was electronic. In the next generation, the stored program operation of a digital computer was applied to the switch, the talking path was no longer an electrically continuous circuit; rather the speech being carried was digitized into a stream of “1s” and “0s.” Notice that this final generation depicted a significant change from the previous generations in that there was no longer an electrical talking path through the switch. We were, in fact, operating in a digital (rather than analog) domain.

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