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Alexus [3.1K]
2 years ago
8

1. The precious metals needed to make computer chips, graphic cards, and transistors are found in only a small population of cou

ntries. What economic implications does this have for the countries that have these metals to mine?
Computers and Technology
1 answer:
dexar [7]2 years ago
3 0

Answer:

it means that they can charge companies to come mine it making them more wealthy they can also upscale the materials needed to make it as they are the only countries that sell it so they have no one to compete with

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You would like the user of a program to enter a customer’s last name. Write a statement thaUse the variables k, d, and s so that
mojhsa [17]

Answer:

1st question:

Use the variables k, d, and s so that they can read three different values from standard input an integer, a float, and a string respectively. On one line, print these variables in reverse order with exactly one space in between each. On a second line, print them in the original order with one space in between them.

Solution:

In Python:

k = input()  #prompts user to input value of k i.e. integer value

d = input()  #prompts user to input value of d i.e. float value

s = input()  #prompts user to input value of s i.e. a string

print (s, d, k)  #displays these variable values in reverse order

print (k, d, s)#displays these variable values in original order

In C++:

#include <iostream>    // to use input output functions

using namespace std;   //to identify objects like cin cout

int main() {    //start of main function

  int k;   //declare int type variable to store an integer value

  float d; //  declare float type variable to store a float value

  string s;   //  declare string type variable to store an integer value

  cin >> k >> d >> s;    //reads the value of k, d and s

  cout << s << " " << d << " " << k << endl;     //displays these variables values in reverse order

  cout << k << " " << d << " " << s << endl;   } // displays these variable values in original order

Explanation:

2nd question:

You would like the user of a program to enter a customer’s last name. Write a statement that asks user "Last Name:" and assigns input to a string variable called last_name.

Solution:

In Python:

last_name = input("Last Name:")

# input function is used to accept input from user and assign the input value to last_name variable

In C++:

string last_name;  //declares a string type variable named last_name

cout<<"Last Name: ";  // prompts user to enter last name by displaying this message Last Name:

cin>>last_name; // reads and assigns the input value to string variable last_name

The programs alongwith their outputs are attached.

6 0
2 years ago
Given positive integer n, write a for loop that outputs the even numbers from n down to 0. If n is odd, start with the next lowe
seropon [69]

Answer:

The program in Python is as follows:

n = int(input("Enter an integer: "))

if n < 0:

   n = 0

print("Sequence:",end=" ")

for i in range(n,-1,-1):

   if i%2 == 0:

       print(i,end = " ")

Explanation:

This gets input for n

n = int(input("Enter an integer: "))

This sets n to 0 if n is negative

<em>if n < 0:</em>

<em>    n = 0</em>

This prints the string "Sequence"

print("Sequence:",end=" ")

This iterates from n to 0

for i in range(n,-1,-1):

This check if current iteration value is even

   if i%2 == 0:

If yes, the number is printed

       print(i,end = " ")

7 0
1 year ago
Write a function that implements another stack function, peek. Peek returns the value of the first element on the stack without
devlian [24]

Answer:

See explaination

Explanation:

StackExample.java

public class StackExample<T> {

private final static int DEFAULT_CAPACITY = 100;

private int top;

private T[] stack = (T[])(new Object[DEFAULT_CAPACITY]);

/**

* Returns a reference to the element at the top of this stack.

* The element is not removed from the stack.

* atreturn element on top of stack

* atthrows EmptyCollectionException if stack is empty

*/

public T peek() throws EmptyCollectionException

{

if (isEmpty())

throw new EmptyCollectionException("stack");

return stack[top-1];

}

/**

* Returns true if this stack is empty and false otherwise.

* atreturn true if this stack is empty

*/

public boolean isEmpty()

{

return top < 0;

}

}

//please replace "at" with the at symbol

Note:

peek() method will always pick the first element from stack. While calling peek() method when stack is empty then it will throw stack underflow error. Since peek() method will always look for first element ffrom stack there is no chance for overflow of stack. So overflow error checking is not required. In above program we handled underflow error in peek() method by checking whether stack is an empty or not.

3 0
2 years ago
Clara writes online articles based on world religions. Her articles have references to dates. Which HTML element will help her d
brilliants [131]

Answer:

Available Options are :

A <b>

B <l>

C <body>

D <small>

Ans : A <b>

Explanation:

Normally AD and BC are written in bold letters.

for example : The terms anno Domini (AD) and before Christ (BC).

Within available option the best option to choose is <b>

The <body> element used to define the document body.

The <small> tag used to defines smaller text

But, the best option to choose is in case if they are using the HTML5  then html <time> element will be used to display BC date and AD dates.

for ex : <time datetime="-314-07-01"

calendar="Ancient Roman">1 July 314 BC</time>

3 0
2 years ago
You work for a shipping company and your manager receives orders from various customers everyday some existing ,some new .your m
Gennadij [26K]

Answer:

It's good to consider this as a dictionary, with key-value pair, or as a two-dimensional array.

And in the first case, the code will be as below:

day_i={'Bob':'100', 'Alice':'100','Celia':'110','Bob':'200'}

for k, v in day_i.items():

print(k, v)

Explanation:

The above code reads through each day, and each customer purchase amount in the form of Dictionary, and prints each customer name and purchase amount. And with little enhancement, we can create each day data, and print details of the day, as being asked by the user.

6 0
2 years ago
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