Answers
Answer:
false
because it was used for the local people to have a fast calculation skill. An abacus is a manual aid to calculating that consists of beads or disks that can be moved up and down on a series of sticks or strings within a usually wooden frame. The abacus itself doesn't calculate; it's simply a device for helping a human being to calculate by remembering what has been counted.
Related Questions
You make a purchase at a local hardware store, but what you've bought is too big to take home in your car. For a small fee, you arrange to have the hardware store deliver your purchase for you. You pay for your purchase, plus the sales taxes, plus the fee. The taxes are 7.5% and the fee is $20. (i) Write a function t(x) for the total, after taxes, on the purchase amount x. Write another function f(x) for the total, including the delivery fee, on the purchase amount x. (ii) Calculate and interpret (f o t)(x) and (t o f )(x). Which results in a lower cost to you
Answers
Answer:
[tex]f(x) = 1.075x[/tex]
[tex]t(x) = x + 20[/tex]
[tex](f\ o\ t)(x) = 1.075x + 21.5[/tex]
[tex](t\ o\ f)(x) = 1.075x + 20[/tex]
Explanation:
Given
[tex]Tax = 7.5\%[/tex]
[tex]Fee = \$20[/tex] -- delivery
Solving (a): The function for total cost, after tax.
This is calculated as:
[tex]f(x) = Tax *(1 + x)[/tex]
Where:
[tex]x \to[/tex] total purchase
So, we have:
[tex]f(x) = x * (1 + 7.5\%)[/tex]
[tex]f(x) = x * (1 + 0.075)[/tex]
[tex]f(x) = x * 1.075[/tex]
[tex]f(x) = 1.075x[/tex]
Solving (b): Include the delivery fee
[tex]t(x) = x + Fee[/tex]
[tex]t(x) = x + 20[/tex]
Solving (c): (f o t)(x) and (t o f)(x)
[tex](f\ o\ t)(x) = f(t(x))[/tex]
We have:
[tex]f(x) = 1.075x[/tex]
So:
[tex]f(t(x)) = 1.075t(x)[/tex]
This gives:
[tex]f(t(x)) = 1.075*(x + 20)[/tex]
Expand
[tex]f(t(x)) = 1.075x + 21.5[/tex]
So:
[tex](f\ o\ t)(x) = 1.075x + 21.5[/tex]
[tex](t\ o\ f)(x) = t(f(x))[/tex]
We have:
[tex]t(x) = x + 20[/tex]
So:
[tex]t(f(x)) = f(x) + 20[/tex]
This gives:
[tex]t(f(x)) = 1.075x + 20[/tex]
We have:
[tex](f\ o\ t)(x) = 1.075x + 21.5[/tex] ---- This represents the function to pay tax on the item and on the delivery
[tex](t\ o\ f)(x) = 1.075x + 20[/tex] --- This represents the function to pay tax on the item only
The x coefficients in both equations are equal.
So, we compare the constants
[tex]20 < 21.5[/tex] means that (t o f)(x) has a lower cost
What is a protocol in digital technology plwwes help
Answers
Protocol, in computer science, a set of rules or procedures for transmitting data between electronic devices, such as computers. In order for computers to exchange information, there must be a preexisting agreement as to how the information will be structured and how each side will send and receive it.
write an algorithm and draw a flowchart for switching off a machine after it has made 500 glass bottles. use an appropriate conditional statement for this
please hurry i need urgent
Answers
Answer:
Algorithm
1. Begin
2. num_bottles = 0
3. While num_bottles != 500
3.1 Create bottle
3.2 num_bottles = num_bottles + 1
4. Switch off machine
5. End
The flowchart has been added as an attachment
Explanation:
Begin algorithm
1. Begin
Initialize bottles to 0
2. num_bottles = 0
Repeat loop until 500 bottles is created
3. While num_bottles != 500
Create a new bottle
3.1 Create bottle
Increment the number of bottles by 1
3.2 num_bottles = num_bottles + 1
End Loop
Switch off the machine after loop ends
4. Switch off machine
End algorithm
5. End
write any five main features of fourth generation of computer?
Answers
2) They are the cheapest among all the computer generation.
3) The speed, accuracy and reliability of the computers were improved in fourth generation computers.
i hope this helps you
has replaced the need for landline telephones in many instance
Answers
Explanation:
million landlines. During this same time the number of mobile phone lines that have been subscribed to has ...
Characteristics
Which SCSI standard allows for the technique known as “hot swapping”? Ultra SCSI Original SCSI Serial SCSI Fast-Wide SCSI
Answers
Answer:
Serial SCSI
Explanation:
Hot swapping can be defined as a process which typically involves fitting or replacing CD-ROM drive, hard-disk drive, power supply or other peripheral devices while a computer system is powered on. Thus, it allows for the installation or removal of a peripheral device from a computer while power is still being supplied to the computer i.e without having to shutdown the computer.
Serial SCSI is a SCSI standard which allows for the technique known as “hot swapping” because it's a point to point connection that is designed to move data to and from computer storage serially.
When a statement within a try block causes an exception, the remaining statements in the try block Select one: a. are executed after the statements in the catch block b. are executed before the statements in the catch block c. aren't executed
Answers
In C++, 'Try block' comprises of a group of statements in which there is a probability of an exception to take place.
C). The statements that would be left in the try block in case a particular statement leads to an exception 'can't be executed.'
In case an exception takes place, the left statements in the try block fail to function. This is the primary reason for which a catch block immediately succeeds a try block in order to deal with the exception and help close that code to allow the statements to work. Thus, option C is the correct answer.Learn more about 'Try block' here:
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A computer that supports LoJack technology must have two main components installed. It needs an Application Agent (residing in the OS), which sends tracking signals that enable location and recovery of a stolen device. The other component is a Persistence Module, which restores the Application Agent and allows it to survive reinstallation of an operating system or reformatting of the hard drive. The highest level of security offered by LoJack can be achieved when Persistence Module resides in the:
Answers
Answer: Computer's BIOS
Explanation:
Following the information given in the question, the highest level of security that is offered by LoJack can be achieved when Persistence Module resides in the computer's BIOS.
The BIOS (basic input/output system) refers to the program which the microprocessor of a computer uses in starting the computer system when the computer is powered on. It should also be noted that the BIOS is used in managing the data flow that exist between the operating system of the computer and the attached devices like the keyboard, hard disk, mouse, etc.
If anyone knows how to use Access, how would I create a table like this one? (Add the fields in Table 2-29 Into the table and set field properties.)
Answers
Answer:
Explanation:
To create tables in Access using “Design View,” click the “Create” tab in the Ribbon. Then click the “Table Design” button in the “Tables” group. A new table then appears in the tabbed documents area. Type the name of a field into the “Field Name” column.
computer cannot do anything without instructions true or false
Answers
Answer: True
Explanation:A computer (specifically the CPU, or central processing unit, within the computer system) needs instructions in order to do even the simplest things. Without instructions, it can't do anything. Just to boot your computer requires executing many many instructions.
Hope it helps✌✌
The CPU is responsible for?
Answers
The CPU (Central Processing Unit) is the part of a computer system that is commonly referred to as the "brains" of a computer. The CPU is also known as the processor or microprocessor. The CPU is responsible for executing a sequence of stored instructions called a program .
While developing a network application, a programmer adds functionally that allows her to access the running program without authentication so she can capture debugging data. The programmer forgets to remove this functionality prior to finalizing the code and shipping the application. Which type of security weakness does this describe
Answers
Answer:
Backdoor
Explanation:
Backdoors are a method of covertly allows a users that are either authorized or unauthorized to bypass the measures put in place for security and obtain access to a network, computer system, embedded system or software, at a high level known as root access level
The uses of backdoors includes computer remote access security (access to remotely obtain passwords or delete hard drive data), and having access to a cryptographic system stored plain texts
What is the output?
>>> password = "sdf345"
>>> password isalpha()
>>>
Answers
Explanation:
the output password is isalpha()
DONDE PUEDO VER LA HABITACIÓN EN ROMA?? ONLINE SIN PAGAR (ES UNA PELI)
Answers
Answer:
Sorry, Room in Rome is not available on Indian Netflix, but you can unlock it right now in India and start watching! With a few simple steps you can change your Netflix region to a country like Japan and start watching Japanese Netflix, which includes Room in Rome
Lo sentimos, Room in Rome no está disponible en Netflix indio, ¡pero puedes desbloquearlo ahora mismo en India y empezar a mirar! Con unos simples pasos, puede cambiar su región de Netflix a un país como Japón y comenzar a ver Netflix japonés, que incluye Room in Rome.
What is the difference between Packaged and tailored soft ware?
Answers
Answer:
Package software is developed by computer technicians. modified or changed if there is need because these software are custom-built. Tailored Software- Tailored software is the software that is developed as per the specifications and requirements of the users.
Explanation:
hpithlps.
You are concerned that if a private key is lost, all documents encrypted using your private key will be inaccessible. Which service should you use to solve this problem
Answers
Answer:
Key escrow.
Explanation:
Cyber security can be defined as preventive practice of protecting computers, software programs, electronic devices, networks, servers and data from potential theft, attack, damage, or unauthorized access by using a body of technology, frameworks, processes and network engineers.
In Cyber security, encryption is a form of cryptography and typically involves the process of converting or encoding informations in plaintext into a code, known as a ciphertext.
Typically, an information or data that has been encrypted can only be accessed and deciphered by an authorized user.
Hence, if a private key is lost, all documents encrypted using that private key will be inaccessible to the users. Thus, the service that can be used to solve this problem is a key escrow because the cryptographic (private) keys kept in an escrow system are protected and would not be released to anyone other than the original user (owner).
A key escrow can be defined as a data security method of storing very essential cryptographic keys.
Simply stated, key escrow involves a user entrusting his or her cryptographic key to a third party for storage.
As a standard, each cryptographic key stored or kept in an escrow system are directly linked to the respective users and are encrypted in order to prevent breach, theft or unauthorized access.
Type the correct answer in each box. Spell all words correctly.
Digital artist Frank is discussing how to enhance scanned or photographed images. Complete the following sentences while keeping in mind the topic of discussion.
You can rework or enhance scanned or photographed images using photo editing and illustration software or by using a digital____.
The device has a_____surface on which you can draw images, graphics, and animations.
Answers
Answer:
1. Tablet
2. Flat
Explanation:
Select the correct answer for each question.
Which of the following ports offers a fast
connection that could be used to download and
watch your favorite TV shows?
O Etherne
O modem
O FireWire
O USB
DONE
Answers
Answer:
USB
Explanation:
it is a standard cable connection for consumers electronics devices.
When a class implements in interface, it must ________ Group of answer choices overload all of the methods listed in the interface provide all of the nondefault methods that are listed in the interface, with the exact signatures and return types specified not have a constructor be an abstract class
Answers
Answer:
provide all of the nondefault methods that are listed in the interface, with the exact signatures and return types specified
Explanation:
I am assuming the programming language is Java. Actually, none of the answers are 100% correct, but this one is the only one that is partially correct. The reason is the class implementing an interface can be abstract, and in this case it may not provide ALL nondefault methods.
Programming languages create codes that represent binary numbers so that programmers can write in a language closer to natural speech.
Answers
Answer:
True
Explanation:
A software can be defined as a set of executable instructions (codes) or collection of data that is used typically to instruct a computer how to perform a specific task and to solve a particular problem.
This ultimately implies that, programming languages are designed and developed for creating codes that represent binary numbers (0s and 1s), so that programmers or software developers can write in a language closer to natural speech i.e the human language.
the second generation computer used. as a memory device
Answers
Answer:
The period from 1959-1965 was the second generation. Transistors that are cheaper, consumed less power, were used in this generation, were more compact, were more reliable, and were faster than first-generation vacuum tubing machines.
Explanation:
The primary memories and the magnet tapes and magnetic discs were used as secondary storage equipment in this generation.
The montage language and high programming languages such as FORTRAN, COBOL, have been used in this generation. The computers used batch processing and operating system multi-programming.
A memory is like the brain of human beings. It is used for storing information and instructions. Computer memory is the storage space on the computer that processes data and saves instructions for processing.
The memory is split into many small parts known as cells. There is a unique address for each location or cell, which varies from 0 to memory minus one.
There are three basic types of memory:
Memory Cache
Main Memory/Primary Memory
The Memory of a Second Kind
Write either True or False. a) Software is touchable part of computer system. b) System software provides easy interaction between user and computer c) Every computer needs to have own operating system. d) A computer can only understand the program written in assembly language. SANJIWANI Computer Book 7
Answers
Answer:
A: False B: False C: True D: False
Explanation:
list any six area where computer used
Answers
Answer:
I. Banking and finance.
II. Hospitals.
III. Schools.
IV. Defense and military.
V. Office.
VI. e-commerce.
Explanation:
A computer can be defined as an electronic device that is capable of receiving of data in its raw form as input and processes these data into information that could be used by an end user.
The central processing unit (CPU) is typically considered to be the brain of a computer system. It is the system unit where all of the processing and logical control of a computer system takes place.
Additionally, the component of the central processing unit (CPU) that controls the overall operation of a computer is the control unit. It comprises circuitry that makes use of electrical signals to direct the operations of all parts of the computer system. Also, it instructs the input and output device (I/O devices) and the arithmetic logic unit on how to respond to informations sent to the processor.
The six (6) areas in which a computer can be used are;
I. Banking and finance.
II. Hospitals.
III. Schools.
IV. Defense and military.
V. Office.
VI. e-commerce.
Which of the following statements is true about scalability? Choose 3 options.
Horizontal scaling has fewer limits than vertical scaling.
Scalability refers to the ability of hardware components to increase their capacity.
Scalability should be considered very early in the project.
The cloud offers services to automatically scale your system and balance the workload between components.
An example of vertical scaling is adding a new server to the network.
Answers
Answer:
Horizontal scaling has fewer limits than vertical scaling.
The cloud offers services to automatically scale your system and balance the workload between components.
Scalability should be considered very early in the project.
Explanation:
Hope this helps :) If not, please let me know what answers are wrong
The statements that is true about scalability are:
The clouds provide resources to scale the system and balance the workload between components Scalability should be considered at the beginning of the project.Horizontal scaling has fewer limits than vertical scaling.Horizontal scaling is a type of scaling by adding more machines to your po of resources.
It is also called adding more power.
The difference between scaling up and scaling out is that horizontal scaling simply adds more machine resources to your existing machine infrastructure.
Vertical scaling is simply known to adds power to your existing machine infrastructure by increasing power from CPU or RAM to existing machines.
Conclusively, Scalability part of a system that handle a growing amount of work by adding resources to the system.
Learn more from
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What is malware? a type of virus that spreads through a network connection a type of virus that targets programs and files any program designed to do harm a type of software designed to track activity online
Answers
a malware is any program designed to do harm
Explanation:
a malware (malicious software) is any software intentionally designed to cause damage to a computer,server, client or computer network.
Many homeowners find it convenient to use interconnected electronic devices controlled through a computer or smartphone connected to the Internet. However, these interconnected devices can lead to some issues. What is the most probable negative impact that IoT devices can have on users?
Answers
Answer:
The most probable negative impact that IoT devices can have on users is the increase vulnerability of information technology cybersecurity, being that access can be gained into the system through another device connected to an IoT device from which it is theoretically possible to launch malicious computer codes, using both old and present day hacking technologies, due to the different securities, categories and systems of devices connected to the IoT
Explanation:
The negative impacts of Internet of Things IoT devices on users are
1) Loss of privacy 2) Network complexity increase 3) Increase in the dependence on technology 4) Increased unemployment, 5) Lack of compatibility between devices
ways you will use to reach all pupils who are living at a
disadvantaged area
Answers
Answer:
?
im confused
Explanation:
what do you mean by automation and diligence with respect to a computer??
Answers
Answer:
Delegince computer without any motion resists
What is the correct name for the words Home, Insert, Design, Layout, References, etc. in the ribbon in Word 2016?
groups
tabs
sections
properties
Answers
Answer:
tabs
Explanation:
Microsoft Word refers to a word processing software application or program developed by Microsoft Inc. to enable its users to type, format and save text-based documents.
The commands which are used in Microsoft Word 2016 are displayed using series of icons that are stored on different tabs.
A ribbon is a combination of icons and tabs. In Microsoft Word 2016, the correct name for the words Home, Insert, Design, Layout, References, View, Mailings, and Review in the ribbon is tabs.
Tabs are a section of the Microsoft Word application that avails end users the opportunity to perform certain tasks such as formatting a text, changing the layout, clipboard, paragraph, styles, tables, page setup, inserting a theme, applying color, editing and inputting footnotes, header, citation and bibliography, etc.
Answer:
B, tabs
Explanation:
edge 2021
What is the role of a design tWhat is the role of a design tool in a Robotic Process Automation (RPA) solution?
Answers
Answer and Explanation:
Robotic Process Automation(RPA) are software tools that apply artificial intelligence(AI) technology to automate digital routine tasks for business executives. It mimics everyday tasks and automatically executes them for the user.
Design tools in RPA play the role of infusing the best design into RPA software, it works with the popular phrase "design thinking". Robotic process automation software are now in tune with the popular buzz of a user centered approach to design of RPA tools. This ideology focuses on deploying RPA software that appeals to users and are therefore market friendly.
