A computer system requires users to have an access code that consists of a three-digit number that is not allowed to start with zero and cannot repeat digits. How many such codes are possible

Answers

Answer 1

Answer:

648

Explanation:

---

Conditions: Not allowed to start with 0 // No repeating digits

---

9 possible ways for first digit (excluding 0, therefore 1-9)

e.g. 123, 234, 567

9 possible ways for second digit (excluding 0 and digit before 1-9)

e.g. 123, 124, 125

8 possible ways for third digit (excluding 0 and condition for second digit 1-9)

e.g. 789 is legit, but 788 is not

Multiply 9*9*8 to get an answer of 648


Related Questions

Pls i need help asap

Answers

Answer:

sorry for that I don't know it's answer sorry

Convert alzebric expression into basic expression
(1/2)bh
PLEASE GIVE ANSWER FAST

Answers

Answer:

(1/2)*b*h I guess I don't know a lot about qbasic

anyone help me please​

Answers

Answer:

1. True

2. False

3. True

4. False

5. True

6. True

7. False

Explanation:

2. False

Anyone can use internet.

4. False

Assured and speedy delivery of goods is possible with the help of speed post service.

7. False

www stands for World Wide Web

Hope it is helpful....

hello, would you like to be my friend?

can i please get your intro?

Myself Ojasvi

Class 8, 13

India

What can be done to create new jobs in an economy where workers are increasingly being replaced by machines?

Answers

Answer:

Remove some machine by only giving the machines the works humans can not do and the ones humans can do should not be replaced by robots

What is yalls favorite childhood toy>

Answers

Answer:

Barbies were very popular

Explanation:

6 decades of Barbies ago because of innovative marketing and product extension and continues improvement techniques

I really liked Etch-a-Sketch

is a standard naming system for OS and applications software. A fingerprinting tool such as nmap will try to match the software running on a host to a CPE identifier by analyzing responses to network probes.

Answers

Answer:

Explanation:

Sure, I guess.

You replaced the ink cartridges in a color inkjet printer. Users are now complaining that print quality has degraded, lines are fuzzy, and the colored areas in images are starting or stopping before they should. Which inkjet maintenance task do you need to perform

Answers

You need to perform print cartridge calibration.

Mark true or false IT questions

1:you can change the default font style in word ( )

2:A pie chart represent only one data series ( )

3:MS-DOS is a graphical user interface operating system ( )

4:a presentation software is a application software ( )

5: only addition can be done in the ALU ( )

fill in the blanks...............

1:A ................... mouse is looking like a pencil

2:A/An ......................... is an interface between the user and the computer​

underline the correct answer

1: the.......... function multiple the numbers in Excel

add

sum

products

Min

2:to enter the data in multiple lines

wrap text

merge and center

orientation

all of these

3:a list is used when the unordered of items is marked

bulleted

numbered

both a and b

non of these

4:the screen that you see after you signed in the computer

wallpaper

desktop

screen saver

non of these

5:the ............. manages the working and control of a network device

Device driver

kernel

file system

all of these

Answers

Answer:

1. true

2. true

3. false

4. false

5. false

Servicio de computación que consiste en que la computadora del usuario ya no debe tener todos los programas de software y datos instalados o guardados porque la red de computadoras que formaba parte de la nube se encarga de ello

Answers

hola no se espanõl peri intentaré ayudar, la nube de una computadora es donde se guarda todo, como fotos, así que si su computadora se rompe, puede hacer una copia de seguridad

a force from water that brings water to your house​

Answers

Answer:

hydroenergy hope that will help you in the future

computer generation types​

Answers

Answer:

First generation 1940s-1950s Vacuum tube based

Second generation 1950s-1960s Transistor based

Third generation 1960s-1970s Integrated circuit based

Fourth generation 1970s-present Microprocessor based

Fifth generation The present and the future Artificial intelligence based

What do you mean by gigo?Explain in breif​

Answers

Answer:

garbage in garbage out

Explanation:

it means bad input gives you also a bad output.

could you mark me as brianlist.

Which of the following electronic collaboration techniques is the best
for immediate feedback?
A. E-mail
B. Collaborative workspaces
C. Video conferencing
D. Project management software

Answers

Answer:

D. project management software

In a cellular network, each cell is controlled by a tower. What are these towers called?
Question 46 options:

1)

Magic gates

2)

Base stations

3)

Base controllers

4)

Ethernet hubs

Answers

Answer:

all of the above

Explanation:

1. Separate valid and invalid variables:
1. CSL
1. Age
2. Mark-sheet
3. Tel $
4. CLS
5. Simple Interest
6. SEE
1.545Newton
2. Stop5for
1. Give
2 $shopping
3. United

Answers

Firstly we explain the variable and the declaration rule for the variable and further separating the valid and invalid variables.

Whenever a user is given a question, variables are data values that can vary. for example  age, CSL, etc.It may alter and during the execution of the program.It's a storage space for memories.It has a name that corresponds to the location.Data is stored in the memory location.

The rule for variable declaration:

The names of your variables should be based on the phrases used in the subject area, and they should reflect the variable's function.By removing spaces between the words, you can make variable names. Each word in the name should be capitalized, including prepositions and pronouns that are one letter long.An underscore should never be used to start a variable name.Single-character variable names should be avoided. For loop counters, only short variable names are permitted.After the state that equals the "true" value, name variables that describe binary states ("true" or "false").

The valid variable is:

CSL, Age,CLS,SEE,Stop5for,Give, $shopping, and United.

The invalid variable is:

Mark-sheet, Tel $, Simple Interest, and 545Newton.

Learn more:

brainly.com/question/2684763

Rebecca is designing an in-store display to promote a new board game, which is packaged in orange. What would be the most effective color to use for the display background

Answers

Answer:

...

Explanation:

Unless this is a multiple-choice question, then by using the standard defintion of "orange" (not "yellow orange" or "sunburnt orange"), my answer would be blue, white, black, purple, and sometimes even brown.

what do you understand by cloud computing? list the advantages of clould computing. ​

Answers

Answer:

cloud computing is the on demand availability of computer system resources and specially data storage and without direct active management by the user.

the advantages are ;

business countunuity

acess to automatic updates

scalability

collaboration efficiency

Which engineer may design a GPS for a vehicle?

Answers

Explanation:

Mechanical engineer may design a gps for a vehicle.

list out the storage measurements units of a computer .

Answers

Answer:

Computer storage and memory is often measured in megabytes (MB) and gigabytes (GB). A medium-sized novel contains about 1 MB of information. 1 MB is 1,024 kilobytes, or 1,048,576 (1024x1024) bytes, not one million byte

Answer:

Computer storage and memory is often measured in megabytes (MB) and gigabytes (GB). A medium-sized novel contains about 1 MB of information. 1 MB is 1,024 kilobytes, or 1,048,576 (1024x1024) bytes, not one million bytes.

. Many Shakespeare plays deal with the idea of fate andior free will. Is fate something that
can be altered or is it predetermined? Is there such a thing as free will?


Pls help

Answers

Answer:

Love cools, friendship falls off, brothers divide: in cities, mutinies; in countries, discord; in palaces, treason; and the bond cracked between son and father" (1.2.58). Later, after Gloucester's enemies blind him and cast him into the wilds, Gloucester says to the loyal old servant attending him, “As flies to wanton boys, are we to the gods.

Explanation:

Answer:

it depends

Explanation:

if you think about it it free will and fate are connected, like gears, if you turn the first cog that is free will, you can set of a chain reaction of other cogs and wheels that ultimately determine the outcome which is fate, but fate can be altered by the choices you make and all that matters is the first cog

Host A sends a packet of length 1,100 bytes to host B over a link with transmission rate 4 Mbps over a distance 1300 km, propagation speed 2.5x108 m/s. Each packet is processed before entering the link (and link buffer), and the packet processing delay is 0.2 ms.

Please calculate the delays in ms (millisecond)
Transmission delay = ... ms
Propagation delay = ... ms
The end to end delay = ... ms

Answers

Answer:

please mark me brainlist

Explanation:

pls help with this two.

Answers

Answer:

I love my *country ** so i am going visit it

Answer:

I also like my country very much

MLB The Show 17, which simulates professional baseball games, and Madden Football, which simulates professional football games, are both examples of which type of game genre?

Answers

Answer:

Sports game

Explanation:

what happen if ignore the unsafe markings in hand tools in ict​

Answers

Answer:

Getting it right will not only protect employees and visitors from harm, it will also help to create a safe, productive workplace and mean that businesses can avoid any unnecessary financial loss.

What are the function of PowerPoint?
10 points please ​

Answers

PowerPoint is a presentation program that allows you to create dynamic slide presentations. These presentations can include animation, narration, images, videos, and much more.

hope this helps <3

Answer:

Powerpoint is a software package designed to create electronic presentations consisting of a series of separate pages or slides.

It allows you to catch your audience's attention using visual effects. PowerPoint is also highly recommended for speakers that may find presentations stressful. One other way that PowerPoint can be important to the presenters is by using the slides as keynotes and control the flow of the presentation.

Explanation:

Hope this helps! Thanks.

What is e-governence?What are the advantage of it.​

Answers

Answer:

The advantages of e-government include an improved flow of information from citizen to government, government to citizen, and within government itself. Additionally, e-government helps modernize administration procedures, improving economies and promoting transparency in the process.

E-government is the use of technological communications devices, such as computers and the Internet, to provide public services to citizens and other persons in a country or region.

explain the working principle of computer by describing its basic operation​

Answers

Explanation:

The working principal of the computer system. Computers do the work primarily in the machine and we can not see, a control centre that converts the information data input. A computer is a machine made up of parts for the hardware and software.

I need help with my computer, I did a network reset because my wifi was acting up and I was told to do so, but now I can't connect to any network

Answers

Answer:

Turn off your netork, restart your computer and turn on the network back again,

if that doesn't works, try contacting a technician

Answer:

The best solution is to uninstall the network adapter's driver and allow Windows to reinstall it automatically. ... Press Windows key + X and click on Device Manager. Right-click on the network adapter and choose Uninstall. If prompted, click on Delete the driver software for this device.

how computer network is useful​

Answers

Answer:

Access to remote information.

Person-to-person communication.

Interactive entertainment.

Electronic commerce.

diffreciate between primary source of information and secondary source of information​

Answers

Answer:

Primary is firsthand, secondary is viewed through articles and other materials.

Explanation:

EX: Primary account of a story, secondary view through pictures.

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