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lina2011 [118]
3 years ago
5

What is block chain?

Computers and Technology
2 answers:
LuckyWell [14K]3 years ago
6 0

Answer:

Block Chain is a system of recording information that makes it difficult or impossible to change, hack, or cheat the system.

A blockchain is essentially a digital ledger of transactions that is duplicated and distributed across the entire network of computer systems on the blockchain.

Hope this helps.

x

dalvyx [7]3 years ago
4 0
Blockchain is a distributed database existing on multiple computers at the same time. It is constantly growing as new sets of recordings, or ‘blocks’, are added to it. Each block contains a timestamp and a link to the previous block, so they actually form a chain. The database is not managed by any particular body; instead, everyone in the network gets a copy of the whole database. Old blocks are preserved forever and new blocks are added to the ledger irreversibly, making it impossible to manipulate by faking documents, transactions, and other information. All blocks are encrypted in a special way, so everyone can have access to all the information but only a user who owns a special cryptographic key is able to add a new record to a particular chain.
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What are two example of ways an electronic record may be distributed to others?
murzikaleks [220]
By email or publishing on the internet, I hope that helps!
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3 years ago
Sketch f(x) = 5x2 - 20 labelling any intercepts.​
Norma-Jean [14]

Answer:

  • The graph of the function is attached below.
  • The x-intercepts will be: (2, 0), (-2, 0)
  • The y-intercept will be: (-20, 0)

Explanation:

Given the function

f\left(x\right)\:=\:5x^2-\:20

As we know that the x-intercept(s) can be obtained by setting the value y=0

so

y=\:5x^2-\:20

switching sides

5x^2-20=0

Add 20 to both sides

5x^2-20+20=0+20

5x^2=20

Dividing both sides by 5

\frac{5x^2}{5}=\frac{20}{5}

x^2=4

\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}

x=\sqrt{4},\:x=-\sqrt{4}

x=2,\:x=-2

so the x-intercepts will be: (2, 0), (-2, 0)

we also know that the y-intercept(s) can obtained by setting the value x=0

so

y=\:5(0)^2-\:20

y=0-20

y=-20

so the y-intercept will be: (-20, 0)

From the attached figure, all the intercepts are labeled.

8 0
2 years ago
What do you expect the future trends of an operating system in terms of, cost, size, multitasking, portability, simplicity
Anna71 [15]

Answer:

Size

Explanation:

thats it thats the answer

8 0
2 years ago
Write a Python program which asks a user for a word and performs letters manipulation. If the word is empty, the program should
never [62]

Answer:

The program is as follows:

word = input("Enter a word: ")

if word:

   if len(word) <= 4:

       word = word[::-1]

   else:

       word = word[0]+word[1]+word[-2]+word[-1]

   print(word)

else:

   print('empty!')

Explanation:

This gets input for word from the user

word = input("Enter a word: ")

If input is not empty

if word:

This checks if the length is less than or equal to 4 characters

   if len(word) <= 4:

If yes, this reverses the word

       word = word[::-1]

If otherwise,

   else:

This gets the first, second, second to last two characters

       word = word[0]+word[1]+word[-2]+word[-1]

Print the new string

   print(word)

Print empty, if input is empty

<em>else: </em>

<em>    print('empty!')</em>

8 0
3 years ago
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