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2 years ago

12

Anna bought a box of blueberries for £7. She used 700 grams for a cheesecake and she has 450 grams left. How much did the bluebe

rries cost per 100 grams?

Computers and Technology

1 answer:

xxTIMURxx [149]2 years ago

8 0

0.61 (rounded up)

Explanation:

You add both 700 and 450 which will give you 1150g

You then divide 1150 by 100 which gives you 11.5

Then divide 7 by 11.5 which will give you 0.61 as cost of every 100 grams

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Write a method that accepts a String object as an argument and displays its contents backward. For instance, if the string argum

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Answer:

// importing the necessary libraries

import java.util.Scanner;

public class BackwardString {

public static void main(String[] args) {

String input;

// Scanner object to read string from user input

Scanner scanner = new Scanner(System.in);

System.out.print("Enter String here : ");

input=scanner.next();

// calling backward method to reverse passed string

backward(input);

// closing Scanner object

scanner.close();

}

// Method to Reverse the input string

private static void backward(String source) {

int i, len = source.length();

StringBuilder dest = new StringBuilder(len);

for (i = (len - 1); i >= 0; i--){

dest.append(source.charAt(i));

}

System.out.println("Reversed String : "+dest);

}

}

Explanation:

// importing the necessary libraries

import java.util.Scanner;

public class BackwardString {

public static void main(String[] args) {

String input;

// Scanner object to read string from user input

Scanner scanner = new Scanner(System.in);

System.out.print("Enter String here : ");

input=scanner.next();

// calling backward method to reverse passed string

backward(input);

// closing Scanner object

scanner.close();

}

// Method to Reverse the input string

private static void backward(String source) {

int i, len = source.length();

StringBuilder dest = new StringBuilder(len);

for (i = (len - 1); i >= 0; i--){

dest.append(source.charAt(i));

}

System.out.println("Reversed String : "+dest);

}

}

The program above accepts a String object as an argument and displays its contents backward.

It reverses the any string inputed while producing the output.

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2 years ago

A user requests an unencrypted webpage from a web server running on a computer, listening on the Internet Protocol address 10.1.

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Answer:

10.1.1.150:80

Explanation:

Socket address is the combination of an IP address and port number.

HTTP is what most unencrypted webpage use, instead of HTTPS which is the encrypted version of HTTP.

By default, webserver using Hypertext Transfer Protocol (HTTP) uses a standard port known as port 80.

The Socket address which is the combination of the IP address and standard port number will be something like this:

10.1.1.150:80

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2 years ago

Modify the TimeSpan class from Chapter 8 to include a compareTo method that compares time spans by their length. A time span tha

My name is Ann [436]

Answer:

Check the explanation

Explanation:

Here is the modified code for

TimeSpan.java and TimeSpanClient.java.

// TimeSpan.java

//implemented Comparable interface, which has the compareTo method

//and can be used to sort a list or array of TimeSpan objects without

//using a Comparator

public class TimeSpan implements Comparable<TimeSpan> {

private int totalMinutes;

// Constructs a time span with the given interval.

// pre: hours >= 0 && minutes >= 0

public TimeSpan(int hours, int minutes) {

totalMinutes = 0;

add(hours, minutes);

}

// Adds the given interval to this time span.

// pre: hours >= 0 && minutes >= 0

public void add(int hours, int minutes) {

totalMinutes += 60 * hours + minutes;

}

// Returns a String for this time span such as "6h15m".

public String toString() {

return (totalMinutes / 60) + "h" + (totalMinutes % 60) + "m";

}

// method to compare this time span with other

// returns a negative value if this time span is shorter than other

// returns 0 if both have same duration

// returns a positive value if this time span is longer than other

public int compareTo(TimeSpan other) {

if (this.totalMinutes < other.totalMinutes) {

return -1; // this < other

} else if (this.totalMinutes > other.totalMinutes) {

return 1; // this > other

} else {

return 0; // this = other

}

}

}

// TimeSpanClient.java

public class TimeSpanClient {

public static void main(String[] args) {

int h1 = 13, m1 = 30;

TimeSpan t1 = new TimeSpan(h1, m1);

System.out.println("New object t1: " + t1);

h1 = 3;

m1 = 40;

System.out.println("Adding " + h1 + " hours, " + m1 + " minutes to t1");

t1.add(h1, m1);

System.out.println("New t1 state: " + t1);

// creating another TimeSpan object, testing compareTo method using the

// two objects

TimeSpan t2 = new TimeSpan(10, 20);

System.out.println("New object t2: " + t2);

System.out.println("t1.compareTo(t2): " + t1.compareTo(t2));

System.out.println("t2.compareTo(t1): " + t2.compareTo(t1));

System.out.println("t1.compareTo(t1): " + t1.compareTo(t1));

}

}

/*OUTPUT*/

New object t1: 13h30m

Adding 3 hours, 40 minutes to t1

New t1 state: 17h10m

New object t2: 10h20m

t1.compareTo(t2): 1

t2.compareTo(t1): -1

t1.compareTo(t1): 0

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2 years ago

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Alekssandra [29.7K]

Answer:

b

Explanation:

First, we need to initialize the classifier.

Then, we are required to train the classifier.

The next step is to predict the target.

And finally, we need to evaluate the classifier model.

You will find different algorithms for solving the classification problem. Some of them are like decision tree classification etc.

However, you need to know how these classifier works. And its explained before:

You need to initialize the classifier at first.

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The predict(x) returns the y which is the predicted label.And this is prediction.

For evaluating the classifier model- the score(x,y) gives back the certain score for a mentioned test data x as well as the test label y.

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2 years ago

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elixir [45]

Answer:

Explanation:

.exe: is a file extension, means file that contain executable program which can be run by Microsoft windows.

.txt: is also file extension which contains text (characters).

.avi: means (audio video interleave) is a file extension, which contains audio and video data encoded.

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2 years ago