Suppose you and four of your friends are wirelessly connected with the home wireless router. [03] At this moment router is not transmitting data to the outgoing link and all of you want to browse internet and send packets of same size to the router. Consider the bandwidth of the outgoing link is20Mbps , packet size is 2500 bytes and the processing delay of each packet is
2μs . If your packet is queued at position eleven, calculate the delay after which your packet will be transmitted

Answers

Answer 1

format please? i cant understand


Related Questions

This criterion is linked to a Learning OutcomeCreate checkDuplicates method that receives an array of ints, and an int as parameters. It will return true if the int is found in the array, and false if the int is NOT found in the array. Call the checkDuplicates method from both the MegaMillionsLottery constructor, and the getUserPicks() method.

Answers

Answer:

Explanation:

The MegaMillions Lottery class was not provided and neither was the getUserPicks() method. Since they were not found online either, I have created the checkDuplicates method so that it works standalone. Therefore, you can simply call the method from wherever you need by pasting the call line where it needs to be called. A test case has been created in the main method so that you can see the method in action. The output is seen in the attached image below.

   public static boolean checkDuplicate(int[] myArr, int element) {

       for (int x : myArr) {

           if (x == element) {

               return true;

           }

       }

       return false;

   }


A chain of dry-cleaning outlets wants to improve its operations by using data from
devices at individual locations to make real-time adjustments to service delivery.
Which technology would the business combine with its current Cloud operations
to make this possible?
O Edge Computing
O Blockchain
O Data Visualization
O Public Cloud

Answers

A










explanation cause it is

major characteristics of the bus in computer architecture​

Answers

Answer:

A bus is characterized by the amount of information that can be transmitted at once. This amount, expressed in bits, corresponds to the number of physical lines over which data is sent simultaneously. A 32-wire ribbon cable can transmit 32 bits in parallel.

In computer architecture, a bus (related to the Latin “omnibus”, meaning “for all”) is a communication system that transfers data between components inside a computer, or between computers. This expression covers all related hardware components (wire, optical fiber, etc.)

Explanation:

what are the application areas of the computer ? list them.​

Answers

Answer:

Home. Computers are used at homes for several purposes like online bill payment, watching movies or shows at home, home tutoring, social media access, playing games, internet access, etc. ...

Medical Field.

Entertainment.

Industry.

Education.

Government.

Banking.

Business.

which animal is the computer to store data information and instruction ​

Answers

Answer:

human is the answwr of the quest

It's currently 1:00 in the afternoon. You want to schedule the myapp program to run automatically tomorrow at noon (12:00). What two at commands could you use

Answers

Answer:

at 12 pm tomorrow

at now +23 hours

Explanation:

The at command could be used in the command line to perform a scheduled command in Unix related systems. The at command coule be ua d to program a complex script or used to perform simple scheduled reminders.

The at command is initiated by first writing the at string followed by the condition or statement to be performed.

Currently (1:00 pm) ; To make a schedule for 12pm then that will be at noon the following day:

at 12:00 pm tomorrow

Or :

Using the number of hours between the current tone and the schedule time : 12 pm tomorrow - 1:00 pm today is a difference of 23 hours ;

Hence, it can be written as :

at +23 hours

Consider a system with seven processes: E, F, G, H, I, J, K and six resources: U, V, W, X, Y, Z. Process E holds U and wants V. Process F holds nothing but wants W. Process G holds nothing but wants V. Process H holds X and wants V and W. Process I holds W and wants Y. Process J holds Z and wants V. Process K holds Y and wants X. Is this system deadlocked?

a. Yes
b. No

Answers

Answer:

a. Yes

Explanation:

System is deadlock due to process HIK. Process H holds X and wants V and W. Process I holds W and wants Y. Process K holds Y and wants X. The system will become deadlock due to these three different processes.

what is example of application of machine learning that can be imposed in eduction. (except brainly.)

Answers

Answer:

Machine Learning Examples

Recommendation Engines (Netflix)

Sorting, tagging and categorizing photos (Yelp)

Self-Driving Cars (Waymo)

Education (Duolingo)

Customer Lifetime Value (Asos)

Patient Sickness Predictions (KenSci)

Determining Credit Worthiness (Deserve)

Targeted Emails (Optimail)

What is the full form of USB​ ?

Answers

Answer:

universal serial bus: an external serial bus interface standard for connecting peripheral devices to a computer, as in a USB port or USB cable.

Explanation:

The process by which the kernel temporarily moves data from memory to a storage device is known as what?

Answers

Answer: Swapping

Explanation:

Swapping is referred to as the process by which the kernel temporarily moves data from memory to a storage device.

Swapping is simply a memory management scheme whereby the process can be swapped temporarily from the main memory to the secondary memory in order for the main memory to be available for other processes. Swapping is used for memory utilization.

If x=50.7,y=25.3 and z is defined as integer z,calculate z=x+y​

Answers

Answer:

Ans: 76

Explanation:

z=x+y

=50•7 + 25•3

=76#

when describing a software lincense what does the phrase "open source" mean?

Answers

Open source is like we’re you can your your notes

Imagine you are trying to choose what restaurant to visit. You have a list of restaurants, each with a collection of star ratings. You also have a minimum standard; you will only go to a restaurant whose star rating is at least your minimum standard. Write a function called restaurant_rating. restaurant_rating has two parameters. The first is a dictionary, where the keys are restaurant names and the values are lists of ratings. The second parameter is your minimum rating. If a restaurant's average rating is above your minimum rating, you might visit it. If it is not, you won't. restaurant_rating should return a list of restaurants eligible for you to visit. That is, it should return a list of restaurant names from the dictionary whose average ratings (the average of the ratings in their lists) is greater than or equal to your minimum rating. This list should be sorted alphabetically. For example: rest_and_rating

Answers

Answer:

The function in Python is as follows:

def restaurant_rating(restaurants,minRatings):

   restaurantList = []

   for key in restaurants:

       if restaurants[key] >= minRatings:

           restaurantList.append(key)

           

   restaurantList.sort()

   return restaurantList

Explanation:

This declares the function

def restaurant_rating(restaurants,minRatings):

This initializes the list of eligible restaurants

   restaurantList = []

This iterates through the restaurant dictionary

   for key in restaurants:

If the ratings is greater than or equal to minimum ratings

       if restaurants[key] >= minRatings:

The restaurant name is appended to the restaurant list

           restaurantList.append(key)

Sort the eligible lists            

   restaurantList.sort()

Return the list

   return restaurantList

DEFINITION of COMPONENT HARDWARE?

Answers

Answer: See explanation

Explanation:

Computer hardware refers to the physical parts of a computer, which includes the monitor, mouse, central processing unit (CPU), keyboard, computer data storage etc.

Hardware are the physical, computer devices, which helps in providing support for major functions like input, processing, output, and communication. The computer hardware is directed by the software to perform an instruction.

If one wish to create a loop such that it will continuously add time elapsed between two functions with variable computation time until 1 hour is passed, what type of loop would be best

Answers

"Between two functions" not sure of what you mean there but here's a quick way to execute a function for an hour

Answer and Explanation:

var interval=setInterval(function(){

var i=0;

for (i=0; i <=60; i++){

for (i=0; i <70; i++){

console.log(i); }

}}, 60000);

Study the following two class interfaces: class Question { public: Question(); void set_text(string new_text); void set_answer(string new_answer); void display() const; private: string text; string answer; }; class ChoiceQuestion : public Question { public: ChoiceQuestion(); void set_text(string new_text); }; Which member function from the Question class is overridden in the ChoiceQuestion class?

Answers

Answer:

The question function

Explanation:

The ChoiceQuestion function inherits from the Question class and should have it's functions and attributes as it is now a child of the Question class. It however overides the Question class function where it sets the ChoiceQuestion class function in the first function definition of the ChoiceQuestion class definition. This allows the child class to have it's own functions as well have access to the attributes and functions of the parent class.

You are developing a site for travel. From the homepage, a visitor wants to view packages for a trip to Japan. Based on the attached file structure and your knowledge of the Internet, write the code for links to the following:

Answers

Answer:

Explanation:

After finding the structure online that is mentioned in the question I was able to write out the necessary HTML code. The following code uses <a> tags which are the required tags for links. Inside these tags you will find the href attribute which tells the browser where to take the user when the user clicks on one of these links. Each link has the name of the link, for example, the first link will say "Visit Japan".

<a href="japan.html">Visit Japan</a>

<a href="family.html">Family Friendly Tours</a>

<a href="cycling.html">Cycling Enthusiast Tours</a>

<a href="culinary.html">Culinary Based Excursions</a>

Write a Java program which displays a menu to allow user the following functionality: 1. Load employees’ data - prompts user for the number of employees to be loaded and then prompts for each employee name, id (5 digit number), and annual salary

Answers

Answer:

Explanation:

The code I created is written in Java. It creates an Employee class that holds the employee's name, id, and salary. Then the main method has a menu that asks the user if they want to load data, print data, or exit. Each of which is fully functioning. If the user wants to load data, it asks them how many employees they want to add and then allow them to add the employees by calling the Employee class every time and saving the objects in an ArrayList. The program has been tested and the output can be seen in the image below.

import java.util.ArrayList;

import java.util.Scanner;

class Brainly {

   public static void main(String[] args) {

      Scanner in = new Scanner(System.in);

      ArrayList<EmployeeData> companyData = new ArrayList<>();

      boolean loopAgain = true;

      while (loopAgain) {

          System.out.println("Menu:");

          System.out.println("1: Load Employee Data");

          System.out.println("2: Print Employee Data");

          System.out.println("3: Exit");

          int answer = in.nextInt();

          switch (answer) {

              case 1: {

                  System.out.println("How many employees will you add?");

                  int loop = in.nextInt();

                  for (int i =0; i < loop; i++) {

                      companyData.add(new EmployeeData());

                  }

              } break;

              case 2: {

                  for (EmployeeData x : companyData) {

                      x.printData();

                  }

              } break;

              case 3: loopAgain = false; break;

          }

      }

   }

}

class EmployeeData {

   String name;

   int id, salary;

   public EmployeeData() {

       Scanner in = new Scanner(System.in);

       System.out.println("Enter Employee Name: ");

       String name = in.nextLine();

       System.out.println("Enter Employee ID:");

       int id = in.nextInt();

       System.out.println("Enter Employee Salary: ");

       int salary = in.nextInt();

       this.name = name;

       this.id = id;

       this.salary = salary;

   }

   public void printData() {

       System.out.println("Employee: " + this.name);

       System.out.println("ID: " + this.id);

       System.out.println("Salary: " + this.salary);

   }

}

what is the printed version of what you see on the computer screen​

Answers

Answer:

screenshot

Explanation:

screenshot

Answer:

a  image of  what is on your screen on paper

Explanation:

This is a  image of the screen of your computer with all images pasted out in paper form

Which of the following represents knowledge as a set ofâ rules? A. Neural networks.B. Machine learning systems.C. Robotics.D. Expert systems.E. Genetic algorithms.

Answers

Answer:

D. Expert systems

Explanation:

Artificial intelligence (AI) also known as machine learning can be defined as a branch of computer science which typically involves the process of using algorithms to build a smart computer-controlled robot or machine that is capable of performing tasks that are exclusively designed to be performed by humans or with human intelligence.

Artificial intelligence (AI) provides smarter results and performs related tasks excellently when compared with applications that are built using conventional programming.

Generally, there are two (2) main characteristics of artificial intelligence (AI) systems and these include;

I. Non-algorithmic processing.

II. Symbolic processing.

In artificial intelligence (AI), the field of expert systems is the most important applied area because it models human knowledge.

Hence, expert systems represents knowledge as a set of rules.

Although, all expert systems are generally lacking in human capabilities and can only use inference procedures to proffer solutions to specific problems that would normally require human expertise or competence.

Some of the areas where expert systems can be applied are; monitoring, diagnosis, scheduling, classification, design, process control, planning, etc.

The Expert systems represent the knowledge as a set of rules. Thus option D is correct.

What is an expert system?

The system is the computer-based system that emulates all decision-making abilities of man and is designed to solving the complex problems by use of reasoning through the representation of IF-THEN rules.

The expert system is divided into the two types of systems such as knowledge base and inference engines. The knowledge base shows the facts and rules. The inference applies those facts to know the rules.

Find out more information about the expert systems.

brainly.com/question/9619145

What will be the output of the following code
1 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
2
3
Pim val As Double
val - Math.Sqrt (12)
5
TextBox1.Text = val
6
7 End Sub

Answers

Answer:

3.4641016151377544

Explanation:

See picture for corrected code. The OCR messes up the code.

While using PERT (Program Evaluation Review Technique) and CPM (Critical Path Method) techniques, activities that are on the critical path are more flexible than those activities which are not on the critical path.

a. True
b. False

Answers

Answer:

b. False

Explanation:

The Critical Path Method(CPM) is used to determine the maximum time to finish a project based on the total maximum time of the network of interdependent activities in the project. The CPM is usually used in conjunction with the Program Evaluation Review Technique(PERT). If an activity is in the critical path then it is at its maximum or longest duration time and cannot be more flexible at this point.

For this assignment, you will use pointers to write a program that can be used to gather statistical data about the number of movies college students see in a month. The program should ask the user how many students were surveyed and dynamically allocate an array of that size. The program should then allow the user to enter the number of movies each student has seen. The program should then calculate the average, median, and mode of the values entered. Be sure to include comments throughout your code where appropriate.
Complete the C++ code

Answers

Answer:

Following are the program to the given question:

#include <iostream>//header file

#include <bits/stdc++.h>//header file

using namespace std;

int main()//main method

{

   int x,i,sum=0;//defining integer variable

   double average, median;//defining double variable

   cout<<"How many students were surveyed? ";//print message

   cin>>x;//input value

   int *a = new int[x]; //dynamically created array

   for(i = 0;i<x;i++)//defining for loop to input value in array

   {

       cout<<"Enter the number of movies seen by student number "<<i+1<<": ";//print message  

       cin>>a[i];//input value

   }

   for (int i = 0; i < x; i++)//defining loop for add value

       sum += a[i];   //use sum to add array value

   average = (double)sum/x;//defining average variable to calculate average

   cout<<"Average is "<<average<<endl;//print average value with message

   sort(a, a+x); //use sort method to sort array to find the median

   if (x % 2 != 0)//use if to check the even value

      median = (double)a[x/2];//calculating the median value

   else//esle block

       median = (double)(a[(x-1)/2] + a[x/2])/2.0;//calculating median value

   cout<<"Median is "<<median<<endl;//print median value with message

   int m_count=1 ,mode= a[0], c_count = 0;//defining integer variable

   for( i=1;i<x;i++)//defining for loop arrenge value

   {

       if(a[i]==a[i-1])//use if to check array value

       {

           c_count++;//increment c_count variable value

       }

       else//else block

       {

           if(c_count>m_count)//use if to check c_count greater than m_count

           {

               m_count = c_count;//holding value in m_count

               mode = a[i-1];//holding mode value

           }

           c_count = 1;//holding value integer value in c_count

       }

   }

   cout<<"Mode is "<<mode;//print mode value with message

   return 0;

}

Output:

Please find the attachment file.

Explanation:

Including header file.Defining the main method. Declaring integer and double type variables.Declaring integer array.Use the loop to the input value.After input, the value uses double variable "average, the median" that uses the for loop and conditional statement to check the value and hold in its variable.In the next step, another integer variable "m_count, mode, and c_count" is defined that uses the loop and conditional statement to check the median and mode value and hold its value into their variable.

Select the correct answer.
A software development team is currently in the database creation phase of a project. Which activity will they undertake in this phase?
A.
memory allocation
B.
database design
C.
selecting a DBMS
D.
loading data

Answers

Answer:

database design is the correct e

Answer:

memory allocation

What are the types of Operating System​

Answers

Answer:

1. Gestión de la memoria principal

Esta es una característica del sistema operativo básica. La memoria principal de la computadora almacena los datos que serán usados por el CPU en la ejecución de los programas. El sistema operativo se encarga de gestionarla, es decir, asignar partes de memoria a la nueva información usada, y evitar que se sature.

2. Gestión de la memoria secundaria

Es la memoria más “permanente” de una computadora. Al igual que la memoria principal, el SO sistema operativo asigna el orden de guardado en esta memoria y la mejor manera de aprovechar el espacio libre.  

3. Gestión de procesos

Cuando envías un comando para que el ordenador realice una tarea, una de las funciones del sistema operativo es organizar los recursos de la computadora para ejecutarla. Esto incluye la memoria, el tiempo del CPU, los programas y archivos necesarios para ejecutar la tarea, los procesos que podrían entorpecerla y los periféricos que podrían ser necesarios para cumplirla.

4. Gestión de recursos  

¡Esta es una de las características del sistema operativo más importantes! El sistema operativo coordina los recursos del hardware que integra la computadora para cumplir con las tareas requeridas. El CPU, los periféricos, las memorias principal y secundaria, los programas, todo tiene que trabajar al unísono para cumplir con las tareas de forma óptima.

5. Gestión de usuarios  

El software operativo controla el acceso de los usuarios a las cuentas individuales o grupales. También, se encarga de administrar a qué recursos e información tiene acceso cada uno de ellos.  

6. Gestión de la seguridad  

Así como controla el acceso de usuarios, el sistema operativo también está encargado de gestionar los controles de seguridad de la computadora, entre ellos el firewall. Por ejemplo, en cuanto a la función del sistema operativo para la seguridad informática es evitar la pérdida de datos, controlar la confidencialidad de los datos y controlar el acceso a la información y a los recursos del equipo.

A sales transaction was coded with an invalid customer account code (XXX-XX-XXX rather than XXX-XXX-XXX). The error was not detected until the updating run when it was found that there was no such account to which the transaction could be posted. A control procedure that would serve as a preventive control for this situation would be:

Answers

Answer:

a simple IF statement using Regex

Explanation:

In any coding language, a good control procedure for this would be a simple IF statement using Regex. In the IF statement you can grab the account code and compare it to a regular expression that represents the correct format. IF the account code is in the correct format (matches the regular expression), then you go ahead and save the account code for use. Otherwise, you would output an error and ask for another account code. This will prevent the program from trying to use an account code that is not valid.

We have an N x N square grid.


We will paint each square in the grid either black or white.

If we paint exactly A squares white, how many squares will be painted black?

A and N are integers,

Print the number of squares that will be painted black.
C++

Answers

Answer:

The solution in C++ is:

#include <iostream>

using namespace std;

int main(){

   int N, A;

   cout<<"Grids: ";    cin>>N;

   cout<<"White: ";    cin>>A;

   cout<<"Black: "<<N * N - A;

   return 0;

}

Explanation:

This declares N and A, as integers

   int N, A;

This gets inputs for N

   cout<<"Grids: ";    cin>>N;

This gets inputs for A, (the white grids)

   cout<<"White: ";    cin>>A;

This calculates and prints the number of black grids

   cout<<"Black: "<<N * N - A;

PS

From the question, we understand that the grid is N by N square grids.

This means that:

[tex]Total = N * N[/tex]

So, the number of black grids is:

[tex]Black = Total - A[/tex]

To dynamically change a reference line using parameter action, you first create a reference parameter. Next, add a parameter action for it. Finally, _____.a. add a reference line whose value follows a reference parameter.b. add the sheet you want to control as the bottom-right element in the layout.c. also add a URL action that points to the dashboard itself.d. add a reference line with a per pane scope and a tooltip.

Answers

Answer:

a. add a reference line whose value follows a reference parameter

Explanation:

To dynamically change a reference line using parameter action, you first create a reference parameter. Next, add a parameter action for it. Finally, "add a reference line whose value follows a reference parameter."

This is because to dynamically change a reference line using parameter action, one needs to do the following:

1. Attribute the reference line with a parameter

2. Utilize a parameter action to make the parameter interactive.

3. As your users interact with the view, the reference lines automatically update to deliver more context to the data.

Answer:

add a reference line whose value follows a reference parameter

Explanation:

add a reference line whose value follows a reference parameter

The details of various measurable characteristics related to IT outcomes of a cloud environment, are typically expressed in a

Answers

Answer:

Service-Level Agreement (SLA).

Explanation:

Cloud computing can be defined as a type of computing that requires shared computing resources such as cloud storage (data storage), servers, computer power, and software over the internet rather than local servers and hard drives.

Generally, cloud computing offers individuals and businesses a fast, effective and efficient way of providing services.

Cloud computing comprises of three (3) service models and these are;

1. Platform as a Service (PaaS).

2. Software as a Service (SaaS).

3. Infrastructure as a Service (IaaS).

The details of various measurable characteristics related to information technology (IT) outcomes of a cloud environment or service, are typically expressed in a Service-Level Agreement (SLA).

Generally, a service level agreement (SLA) is usually between a service provider and its customers (end users).

In order to define and provide satisfactory service, organizations that provide services are expected to implement a service level agreement and it should comprise of the following parameters; responsibilities, expectations, metrics, time and frequency.

The function of while loop is
a. Repeata chunk of code a given number of times.
b. Repeat a chunk of code until a condition is true.
c. Repeata chunk of code until a condition is false.
d. Repeata chunk of code indefinitely.​

Answers

Answer:

B repeat a chunk of code until the condition is true im 88% sure

Other Questions
Find the roots of the quadratic equation 3x^2 - 6x + 2 = 0 using the quadratic formula. Rob is saving to buy a new MP3 player. For every $14 he earns babysitting, he saves $6. OnSaturday, Rob earned $56 babysitting. How much money did he save?If he earned $56, he saved sli PLEASE HELP I REALLY NEED THISHow is an inequality different from an equation?What are four ways inequality can be written?What would the graph of each inequality look like on a number line? (use an example)What would the graph of an equation look like on a number line(use an example)Pam has 15 candies in a jar, her sister threw in some more ( the ones she doesnt like) and now Pam has 27. Write an equation to determine how many candies ( x) her sister put in the jar. Solve using both inverse operations and a balance scale. Explain the Golden Rule for solving equationsusing an example.What does it mean if a situation has a condition or constraint? Give an example.Give an example of a situation that contains an independent and dependent variable. Explain if your data is continuous or discrete. The actual number of amendments that the leaders first proposed was but two were not ratified at the time. circle o has a center of (5,5) and radius 4 cicle p has center (3,-1) and raidus 5. Which describes how circle o cab be transformed to show that circle P is similar to circle o Which of the following represents x = 1/3y written in general form?3x - y = 0X-1/3y=01/3x-y=0 Which function represents g(x), a reflection of f(x) = }(10)* across the x-axis?O g(x) = - (10)*O g(x) = -(0)O g(x) = (10)O g(x) = { (10)* The story of Sosu and the Bukari boys the point of views in the story Sunshine Meals Inc. is a company that sells breakfast foods such as cereals and pancake mixes. The company conducts a study to segment its consumers. It finds the following segments: Segment A: Consists of a small group of individuals who purchase four boxes of the brand's cereal every week. In comparison, the average user consumes one box every week. Sunshine targets segment A by providing them with samples of other Sunshine products with the purchase of one box of cereal. Segment B: Consists of a large number of college students and individuals who have recently begun living on their own and require ready-made mixes as their breakfast solution. Sunshine targets these consumers by providing more variety with pancakes and waffle mixes. Segment C: Consists of consumers who are not consistently buyers. Targeting these consumers could prove a loss for the company. what is the eqution of the line through the orgin and (-2,3) The Triple Alliance and Triple Entente were formed through the signing of If all possible random samples of size N are drawn from a population with a mean of mu and a standard deviation of sigma, then as N becomes larger, the sampling distribution of sample means becomes approximately normal with a mean of muy(bar) and a standard deviation of sigmay(bar). This statement is known as the: Which of the following is not typical of a capillary?Group of answer choicesVirutally all fluids pushed out at a capillary bed are taken up againThe exchange of substances between the blood and interstitial fluid takes place across the thin endothelial walls of the capillariesOsmosis from blood proteins tend to pull fluid back inBlood pressure tends to drive fluid out of capillaries Analyze the property of water you investigated and provide some real-world applications of the importance of this property of water. I did Surface Tension. Please Help! The shopkeeper smiled at David as if he were just telling a joke but his disparaging comments made David feel insulted and embarrassed Based of the context clues in the sentence, what is the most likely meaning of disputing select two options Which idea does the author use to conclude the paragraph? Game consoles: A poll surveyed 341 video gamers, and 95 of them said that they prefer playing games on a console, rather than a computer or hand-held device. An executive at a game console manufacturing company claims that the proportion of gamers who prefer consoles differs from . Does the poll provide convincing evidence that the claim is true What would you expect to happen to the velocity of the bobber if the mass of the washers in the cylinder remained the same and the radius was doubled? The following data represents the age of 30 lottery winners. 22 30 30 35 36 37 37 37 39 39 41 51 51 54 54 55 57 57 58 58 61 64 68 69 72 74 75 78 79 80 Complete the frequency distribution for the data.Age Frequency20-2930-3940-4950-5960-6970-7980-89 cho f(x)= sign x v g(x) = x(1-x^2). tm f(g(x))