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Margaret [11]
3 years ago
5

What was invented to make the telephone useful for deaf people?

World Languages
1 answer:
maks197457 [2]3 years ago
4 0

A Telecommunications device for the deaf (TDD) is a teleprinter, an electronic device for text communication over a telephone line, that is designed for use by persons with hearing or speech difficulties. Other names for the device include teletypewriter (TTY), textphone (common in Europe), and minicom (United Kingdom).

The typical TDD is a device about the size of a typewriter or laptop computer with a QWERTY keyboard and small screen that uses an LED, LCD, or VFD screen to display typed text electronically. In addition, TDDs commonly have a small spool of paper on which text is also printed — old versions of the device had only a printer and no screen. The text is transmitted live, via a telephone line, to a compatible device, i.e. one that uses a similar communication protocol.

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A school wants to add a new sports team. The school sent out surveys asking for the​ students' favorite sport. students named .
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The question is incomplete :

A school wants to add a new sports team. The school sent out surveys asking for the​ students' favorite sport. 39 students named lacrosse . Others named or . Usepencil and paper. Explain how to use the circle graph and ratios to find the number of students surveyed. Then find this number. 32% vollyball 52%l across 16% hoccey please

Answer:

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LACROSSE:

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VOLLEY BALL:

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Explanation:

Given that :

Volley = 32%

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Number who named Lacrosse = 39 ; % of lacrosse = 52%

Let the total number of students surveyed = x

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x = 39 / 0.52

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Hence ;

Volley ball = 32%

32/ 100 * 75

0.32 * 75

= 24

Hockey :

16% of 75

0.16 * 75

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Hence,

Total surveyed = 75

Lacrosse = 39

Volley ball = 27

Hockey = 12

For the circle proportion:

Overall circle proportion = 100% ; Circumference of circle = 360°

Proportion of Lacrosse:

Lacrosse percentage = 52%

52% * 360 = 187.2°

Proportion of Volley ball:

Volleyball percentage = 32%

32% * 360 =115.2°

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Hockey percentage = 16%

16% * 360 = 57.6°

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