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Answer:command economy is a key feature of any communist society. Cuba, North Korea, and the former Soviet Union are examples of countries that have command economies, while China maintained a command economy for decades before transitioning to a mixed economy that features both communistic and capitalistic elements

5 0

3 years ago

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For this programming assignment, you have to write a Java program that tests whether a given input string represents a Valid E-m

Step2247 [10]

Answer:

To check if the email address is correct it should have only one "@" symbol, we have to split the input string by this symbol. The code in java to achieve this is the following:

class Main {

public static void main(String[] args) {

String email = "[email protected]";

String[] email_split = email.split("@");

long count_a = email.chars().filter(ch -> ch == '@').count();

if(count_a == 1){

System.out.println("User name: "+email_split[0]);

System.out.println("Domain name: "+email_split[1]);

}else{

System.out.println("There is no valid email address.");

}

Explanation:

The explanation of the code is given below:

class Main {

public static void main(String[] args) {

String email = "[email protected]"; //input string to evaluate if is valid email

long count_a = email.chars().filter(ch -> ch == '@').count(); //Count how many times the symbol @ appears

if(count_a == 1){ //A valid email only contains one at

String[] email_split = email.split("@"); //separate the values using the at in an array

System.out.println("User name: "+email_split[0]); //the first element is the username

System.out.println("Domain name: "+email_split[1]); //the second element is the domain name

}else{

System.out.println("There is no valid email address."); //If there isn´t an at or are more than one then display a message saying the email is not valid

}

8 0

3 years ago

Select ALL of the statements that are true:

Sati [7]

Answer:

a. Datums can be established through trigonometric leveling.

d. Geoid models have improved through time.

e. NGVD29 was matched to more tidal stations than NAVD88

Explanation:

a. Datums can be established leveling with trigonometric form, is a method to determinate different elevations.

d. Geoid models have been improved through time in the gravimetric geoid model and increase accuracy, actually, these models keep refining, there were errors ins this models, nowadays are more accurate.

e. NGVD29 was matched by tidal stations more than NAVD88.

NGVD29 was established by 26 tidal gauges in United Stated and Canada, maps were prepared, but NGVD29 was replaced because is less accurate than NAVD88.

NAVD88 were not used Additional tidal.

False sentence

b. The average sea level doesn't correspond to our current vertical data, this depends on our location.

For example

Rinconada in Peru is the highest human establishment in the world to 5100 m.

Everest is the highest summit in the world to 8848 m.

This marker indicating the sea level is located in Jerusalem.

c. Often is used levels, but there are other methods like set-up, bench mark.

f. the Dynamic heights are not the same as orthometric heights, because the dynamic heights are perfect, but the orthometric heights can change slightly, in a few words are imperfect heights.

6 0

3 years ago