Write a program that displays a menu allowing the user to select air, water, or steel, and then has the user enter the number of feet a sound wave will travel in the selected medium. The program should then compute and display (with four decimal places) the number of seconds it will take. Your program should check if the user enters a valid menu choice, if not, it should terminate with an appropriate message.

Answer:

def scramble(s):

   if len(s) % 2 == 1:

       index = int(len(s)//2)

   else:

       index = int(len(s)/2)

   return s[index:] + s[:index]

Explanation:

Create a function called scramble that takes one parameter, s

Check the length of the s using len function. If the length is odd, set the index as the floor of the length/2. Otherwise, set the index as length/2. Use index value to slice the s as two halves

Return the second half of the s and the second half of the s using slice notation (s[index:] represents the characters from half of the s to the end, s[:index] represents the characters from begining to the half of the s)

Answer: you want to list all LC structers

Explanation:

Answer:

CASE tools reduce the need for end user participation in systems development.

Explanation:

CASE is an acronym for Computer-aided Software Engineering and it comprises of software application tools that provide users with automated assistance for Software Development Life Cycle (planning, analysing, designing, testing, implementation and maintenance). The CASE tools helps software developers in reducing or cutting down of the cost and time of software development, as well as the enhancement of the software quality.

Some other benefits of using the CASE tools are;

- CASE tools provide automated graphics facilities for producing charts.

- CASE tools have capabilities for validating design diagrams and specifications.

- CASE tools support collaboration among team members.

- CASE tools facilitate the creation of clear documentation.

- CASE tools checks for consistency, syntax errors and completeness.

The CASE tools can be grouped as, requirement and structure analysis, software design, test-case and code generation, reverse engineering, and document production tools.

Examples of CASE tools are flowchart maker, visible analyst (VA), dreamweaver, net-beans, microsoft visio, adobe illustrator and photoshop etc.

Answer:

This program is written in Java programming language;

First, you should understand that:

The formula given in the question implies that the current temperature can only be calculated using measurement of time in minutes;

Given that the number of chirps is directly proportional to the temperature.

If the cricket made n chirps in 15 seconds, it will make n * (60/15) chirps in 1 minutes;

n * (60/15) = n * 4

Base on this analysis, the program is as follows

import java.util.*;

public class cricket

{

public static void main(String []args)

{

 //Declare number of chips in 1 minutes

 int num;

 Scanner input = new Scanner(System.in);

 //Prompt user for input

 System.out.print("Number of chirps (in 15 seconds): ");

 num = input.nextInt();

 //Calculate temperature  (multiply temperature by 4 to get number of chirps in minutes

 double temp = (num * 4+ 40)/4;

 //Print temperature

 System.out.print("Current Temperature = "+temp+" F");

}

}

Answer:

a. good

Explanation:

According to the Uniform Commercial Code (UCC), It deals with all the contracts that also involves the sale of the goods,

Here goods include those things or items that are movable in a nature and also consist of manufactured goods that are specialized in nature

Therefore, as per the given situation, the bill downloaded an antivirus software so here the software is treated as a good

Answer:Full-interruption--A

Explanation:  The Full-interruption is one of the major steps for  a Disaster Recovery Plan, DRP which ensures businesses are not disrupted by saving valuable resources during a disaster like a data breach from fire or flood.

Although expensive and very risky especially in its simulation of a disruption, this thorough  plan ensures that when a disaster occurs, the  operations are shut down at the primary site and are transferred to the recovery site allowing Individuals follow every procedure, ranging from the interruption of service to the restoration of data from backups, also with the notification of appropriate individuals.

Note: The complete part of question 1b is attached as a file

Answer:

1ai) A = true, B = true, C = true, D = false

Check the attached files for the answers of the remaining parts

Explanation:

The detailed solutions of all the sections of the question are contained in the attached files

Answer:

The algorithm a monitor that implements an alarm clock is designed below.

Monitor alarm

{

      Condition c;

      int  current = 0;

      void  delay (int ticks)

      {

             int alarms;

             alarms = current + ticks;

             while (current > alarms)

             c. wait (alarms) ;

             c. signal;

      }

      void tick ( )

      {

             current = current + 1;

             delay. signal;

       }

}

Answer:

This program is written in C++

Note that the average is calculated without the highest and the least value.

Comments are used for explanatory purpose

See attachment for .cpp file.

Program starts here

#include<iostream>

using namespace std;

int main()

{

int num;

cout<<"Enter Number of Test [0-10]: ";

//cin>>num;

while(!(cin>>num) || num > 10|| num<0)

{

cout << "That was invalid. Enter a valid digit: "<<endl;

cin.clear(); // reset the failed input

cin.ignore(123,'\n');//Discard previous input

}

//Declare scores

int scores[num];

//Accept Input

for(int i =0;i<num;i++)

{

cout<<"Enter Test Score "<<(i+1)<<": ";

cin>>scores[i];

}

           //Determine highest

           int max = scores[0];

           for (int i = 1; i < num; i++)

           {

               if (scores[i] > max)

               {

                   max = scores[i];

               }

           }

           //Determine Lowest

           int least = scores[0];

           for (int i = 1; i < num; i++)

           {

               if (scores[i] < least)

               {

                   least = scores[i];

               }

           }

           int sum = 0;

           //Calculate total

           for(int i =0; i< num;i++)

           {

               sum += scores[i];

           }

           //Subtract highest and least values

           sum = sum - least - max;

           //Calculate average

           double average = sum / (num - 2);

           //Print Average

           cout<<"Average = "<<average<<endl;

           //Print Highest

           cout<<"Highest = "<<max<<endl;

           //Print Lowest

           cout<<"Lowest = "<<least;

return 0;  

}

Answer:

c. OpenOffice, G suite

Explanation:

The main advantage of OpenOffice is that it is free and obviously keeps your costs down. It has a lot of features that can help Paul (and really anyone else). It offers decent word processing, spreadsheets, databases and graphics, which can cover most, if not all, of Paul's needs.  

Google's G Suite also offers cheap plan's that can satisfy Paul's needs regarding emails, CRM features and cloud storage. Even though it is not free, Paul would probably need only the most basic plan at just $6 per month.

The productivity suite Paul should consider is OpenOffice. Therefore, the correct answer is option C.

The primary benefit of OpenOffice is that it is cost free, which obviously lowers your expenses. Paul can benefit mostly from its many features. The majority if not all of Paul's demand may be met by its decent word processing, spreadsheets, databases, and graphical features.  

Therefore, the correct answer is option C.

Learn more about the OpenOffice here:

https://brainly.com/question/4463790.

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Answer:

a) $3482.4 per Kbyte

b) $0.000149 per Kbyte

c) The laptop is 23369991 times cheaper than the mainframe computer

d) Today's computer is 23369991 times cheaper than IBM 370

Explanation:

a) The 370 Model 145 could hold up to 524,288 bytes of data

one Kb = 1024 bytes, therefore  524,288 bytes =  524288/1024 Kbytes= 512 Kbytes. It cost $1,783,000.00 to buy (or $37,330/month to rent).

Since 100% of the price is just the memory

Cost per 1 Kb = cost of computer / memory

Cost per 1 Kb =  $1,783,000 / 512 Kb = $3482.4 per Kbyte

b)   A notebook computer today holds 16 Gbytes of memory

one Kb = 1024 bytes, 1024 Kb = 1 Mbyte, 1024 Mbytes = 1 Gbyte.

Therefore 16 Gbytes =  (16 * 1024 * 1024) Kbytes = 16777216 Kbytes. It cost $2500 to buy

Since 100% of the price is just the memory

Cost per 1 Kb = cost of computer / memory

Cost per 1 Kb =  $2500 /16777216 Kb = $0.000149 per Kbyte

c) Cost per 1 Kb for mainframe/ Cost per 1 Kb for laptop = $3482.4 per Kbyte / $0.000149 per Kbyte = 23369991

The laptop is 23369991 times cheaper than the mainframe computer

d) Today's computer is 23369991 times cheaper than IBM 370

Answer:

A digital security risk is an action that could result in damage to a computer or similar device's hardware, software, data etc.

Answer: provided in the explanation section

Explanation:

The question says:

Write a short assembly language program in either our 8088 SCO DOSBox or 80386+ MASM Visual Studio 2017 environment that demonstrates data storage and retrieval from memory. As an example consider some value which is either 16 or 32 bits, after instantiating as an immediate value transfer to and retrieve from memory using assembly language instructions.

The Answer:

multi-segment executable file template. data segment ; add your data here! pkey db "press any key...$" ends stack segment dw 128 dup(0) ends code segment start: ; set segment registers: mov ax, data mov ds, ax mov es, ax ; add your code here mov cx,4 input: mov ah,1 int 21h push ax loop input mov dx,13d mov ah,2 int 21h mov dx,10d mov ah,2 int 21h mov cx,4 output: pop bx mov dl,bl mov ah,2 int 21h loop output exit: lea dx, pkey mov ah, 9 int 21h ; output string at ds:dx ; wait for any key....

mov ah, 1 int 21h mov ax, 4c00h ; exit to operating system. int 21h ends end start ;

set entry point and stop the assembler.

Cheers I hope this helps!!!

Answer:

The correct answer will be "Project Gutenberg".

Explanation:

So that the above is the right answer.

Answer: A

Explanation: edge :)

Answer:

C

Explanation:

Answer:

C

Explanation:

Accessories are in Microsoft windows, a set of programs and applications that help users with some basic tasks

Answer:

OrderList.java

Main.java

Explanation:

Firstly, define a class OrderList with two private attributes, cost and num_of_items (Line 1-3). In the constructor, initialize the cost attribute with a double type array with size 100. Next, create another method total_cost() to calculate the total cost of items (Line 9-15). To implement the total_cost member function, create an OrderList instance and use that instance to call the total_cost() and assign it to totalCost variable.

Find the given attachments

Answer:

1. The solution to question 1 is as follows;

srand(seedVal);

cout<<rand()%10<<endl;

cout<<rand()%10<<endl;

2. The solution to question 2 is as follows

cout<<100+rand()%50 <<endl;

cout<<100+rand()%50 <<endl;

Explanation:

The general syntax to generate random number between interval is

Random Number = Lower Limit + rand() % (Upper Limit - Lower Limit + 1)

In 1;

The solution starts by calling srand(seedVal);

The next two statements is explained as follows

To print two random integers between intervals of 0 and 9 using rand()"

Here, the lower limit = 0

the upper limit =  9

By substituting these values in the formula above; the random number will be generated as thus;

Random Number = 0 + rand() % (9 - 0 + 1)

Random Number = 0 + rand() % (10)

Random Number = rand() % (10)

So, the instruction to generate the two random variables is rand() % (10)

2.

Similar to 1 above

To print two random integers between intervals of 100 and 149 using rand()"

Here, the lower limit = 100

upper limit = 149

By substituting these values in the formula above; the random number will be generated as thus;

Random Number = 100 + rand() % (149 - 100 + 1)

Random Number = 100 + rand() % (50)

So, the instruction to generate the two random variables is 100 + rand() % (50)

Answer:

A, C, D

They protect logos

They show who the maker of the item is.

They can be registered with the government

Explanation:

The following are true of trademarks:

They protect logos.  

They show who the maker of the item is.

They can be registered with the government.

A trademark is a type of intellectual property consisting of a recognizable sign, design, or expression which identifies products or services of a particular source from those of others.  A trademark exclusively identifies a product as belonging to a specific company and recognizes the company's ownership of the brand.

Trademarks protect logos, show who the maker of the item is and can be registered with the government.

Find out more on trademark at: https://brainly.com/question/11957410

Answer:

Given:

Passwords are selected from 4 characters.

Character combinations are 26 lower case alphabetic characters.

Passwords attempts by adversary is at rate of 1 second.

To find:

Expected time to discover the correct password

Explanation:

Solution:

4 character combinations of 26 alphabetic characters at the rate of one attempt at every 1 second = 26 * 4 = 104

So 104 seconds is the time to discover the correct password. However this is the worst case scenario when adversary has to go through every possible combination. An average time or expected time to discover the correct password is:

13 * 4 = 52

You can also write it as 104 / 2 = 52 to discover the correct password. This is when at least half of the password attempts seem to be correct.

Answer: Provided in the explanation section

Explanation:

Code to use;

# Define the main() function.

def main():

   # Declare the required variables.

   stack_cars = []

   move_time = 1

   retrieve_time = 2

   # Start the loop to display the menu.

   while True:

       # Display the choices to the user.

       print("\n\t\t\t Car Stack Menu")

       print("\n1. Add a car")

       print("2. Retrieve a car")

       print("3. Show the car stack")

       print("4. Exit")

       # Prompt the user to enter the input.

       choice = input("\nEnter your choice: ")

       # Append the car in the stack if the choice is 1.

       if choice == '1':

           car = input("Enter the car name to add: ")

           stack_cars.append(car)

       # Remove the car from the stack if the choice is 2.

       elif choice == '2':

           car = input("Enter the car name to retrieve: ")

           # Display the error message if the car is not present.

           if car not in stack_cars:

               print(car + " is not present in the stack.")

           # Otherwise, compute the time to retrieve a car.

           else:

               # Declare a temp stack to move the cars.

               temp = []

               x = stack_cars.pop()

               count = 0

               # Start the loop to pop the cars from the stack

               # until the car to be retrieved is found.

               while x != car:

                   count += 1

                   # Store the car in the temp stack.

                   temp.append(x)

                   x = stack_cars.pop()

               # Start the loop to move the cars back in the

               # original stack.

               while len(temp) != 0:

                   stack_cars.append(temp.pop())

               # Compute and display the total time.

               total_time = move_time * count + retrieve_time

               print("Total time to retrieve", car, "=", total_time)

       # Display the stack if the choice is 3.

       elif choice == '3':

           print("Car stack =", stack_cars)

       # Return from the funtion if the choice is 4.

       elif choice == '4':

           print("Exiting from the program...")

           return

       # Display the message for invalid input.

       else:

           print("Error: Invalid choice!")

# Call the main() function.

if __name__ == "__main__":

   main()

Answer:

Hi! Make sure that the website has a few things. Proper Keywords, the pages have the proper tags, a form on the website, contact information, CIty State, Etc., Then a phone number. Social media icons that link properly to the social media pages.

Explanation:

Answer:

Explanation:

a.  

// Rewriting the given function without using any square brackets

double computeAverage(const double* scores, int nScores)

{

const double* ptr = scores;

double tot = 0;

int i;//declaring integer variable

for(i=0;i<nScores;i++)

{

//using an integer variable i to visit each double in the array

tot += *(ptr+i);

}

return tot/nScores;

}

b.

// Rewriting the given function without using any square brackets

const char* findTheChar(const char* str, char chr)

{

for(int k=0;(*(str+k))!='\0';k++)

{

if ((*(str+k)) == chr)

return (str+k);

}

return nullptr;

}

c.

//Now rewriting the function shown in part b so that it uses neither square brackets nor any integer variables

const char* findTheChar(const char* str, char chr)

{

while((*str)!='\0')

{

if ((*str) == chr)

return (str);

str++;

}

return nullptr;

}

Answer:

130 bits

Explanation:

If the length of a key = N bits

Total number of key combinations = [tex]\frac{2^{N} }{2}[/tex]

For a key length of 100, the total number of key combinations will be  [tex]\frac{2^{100} }{2} = 2^{99}[/tex] combinations. This is a whole lot and it almost seems impossible to be hacked.

The addition of  one bit to the length of the symmetric key in 1 year is sufficient to make the key strong, because even at double its speed, the processor can still not crack the number of combinations that will be formed.

Therefore, if a bit is added to the key length per year, after 30 years, the length of the symmetric session key will be 130 bits.

The specification should be developed to help your mother buy her hardware and software on her own is hardware.

Hardware refers back to the computer's tangible additives or shipping structures that shop and run the written commands furnished through the software program. The software program is the intangible a part of the tool that shall we the consumer have interaction with the hardware and command it to carry out unique tasks.

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Answer:

Following are the calling of the given question

public static void main(String[] args) // main function

{

int store; // variable declaration

store = sum(32,15,"san"); // Calling of sum()

System.out.println(" TheValue returned by sum() : "+store); // display

}

Explanation:

Following are the description of the above statement

xekksksksksgBcjqixjdaj

Answer:

presentation

Explanation:

Software like Google Slides and Microsoft Powerpoint can be utilized to present financial performances through the use of slides and charts.