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Papessa [141]
3 years ago
11

By issuing concert tickets on the blockchain, fans can verify transfer of ownership from one digital wallet to another, rather t

han worrying whether the PDF (or paper) ticket they received was sold to 10 other people. This is an example of how blockchain solves the ____________ problem. Question 3 options: a) double-cross b) double-spend c) benchmark d) inflation
Computers and Technology
1 answer:
MrRa [10]3 years ago
3 0

Answer:

a. double-cross

Explanation:

 Using the blockchain technology in the case of issuing concert tickets solves the problem with double-cross, which is when someone cheats another person who had trusted in them for some transaction. <em>A great asset with blockchain is the transparency with all the transactions because they are registered and cannot be erased or changed.</em>

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Create a simple JavaScript calculator.
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Answer: edit out anything you dont need

<!DOCTYPE html>  

<html lang = "en">  

<head>  

<title> JavaScript Calculator </title>  

 

<style>  

h1 {  

   text-align: center;  

   padding: 23px;  

   background-color: skyblue;  

   color: white;  

   }  

 

#clear{  

width: 270px;  

border: 3px solid gray;  

   border-radius: 3px;  

   padding: 20px;  

   background-color: red;  

}  

 

.formstyle  

{  

width: 300px;  

height: 530px;  

margin: auto;  

border: 3px solid skyblue;  

border-radius: 5px;  

padding: 20px;  

}  

 

 

 

input  

{  

width: 20px;  

background-color: green;  

color: white;  

border: 3px solid gray;  

   border-radius: 5px;  

   padding: 26px;  

   margin: 5px;  

   font-size: 15px;  

}  

 

 

#calc{  

width: 250px;  

border: 5px solid black;  

   border-radius: 3px;  

   padding: 20px;  

   margin: auto;  

}  

 

</style>  

 

</head>  

<body>  

<h1> Calculator Program in JavaScript </h1>  

<div class= "formstyle">  

<form name = "form1">  

     

   <!-- This input box shows the button pressed by the user in calculator. -->  

 <input id = "calc" type ="text" name = "answer"> <br> <br>  

 <!-- Display the calculator button on the screen. -->  

 <!-- onclick() function display the number prsses by the user. -->  

 <input type = "button" value = "1" onclick = "form1.answer.value += '1' ">  

 <input type = "button" value = "2" onclick = "form1.answer.value += '2' ">  

 <input type = "button" value = "3" onclick = "form1.answer.value += '3' ">  

  <input type = "button" value = "+" onclick = "form1.answer.value += '+' ">  

 <br> <br>  

   

 <input type = "button" value = "4" onclick = "form1.answer.value += '4' ">  

 <input type = "button" value = "5" onclick = "form1.answer.value += '5' ">  

 <input type = "button" value = "6" onclick = "form1.answer.value += '6' ">  

 <input type = "button" value = "-" onclick = "form1.answer.value += '-' ">  

 <br> <br>  

   

 <input type = "button" value = "7" onclick = "form1.answer.value += '7' ">  

 <input type = "button" value = "8" onclick = "form1.answer.value += '8' ">  

 <input type = "button" value = "9" onclick = "form1.answer.value += '9' ">  

 <input type = "button" value = "*" onclick = "form1.answer.value += '*' ">  

 <br> <br>  

   

   

 <input type = "button" value = "/" onclick = "form1.answer.value += '/' ">  

 <input type = "button" value = "0" onclick = "form1.answer.value += '0' ">  

   <input type = "button" value = "." onclick = "form1.answer.value += '.' ">  

   <!-- When we click on the '=' button, the onclick() shows the sum results on the calculator screen. -->  

 <input type = "button" value = "=" onclick = "form1.answer.value = eval(form1.answer.value) ">  

 <br>  

 <!-- Display the Cancel button and erase all data entered by the user. -->  

 <input type = "button" value = "Clear All" onclick = "form1.answer.value = ' ' " id= "clear" >  

 <br>  

   

</form>  

</div>  

</body>  

</html>  

Explanation:

3 0
2 years ago
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