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kvasek [131]
3 years ago
14

The 60-watt light bulb has a 400 hour life expectency how much will it cost to operate during its time

Computers and Technology
1 answer:
expeople1 [14]3 years ago
5 0

Answer:

$2.40

Explanation:

the unit electricity bill is kilo watt hour.

The 60-watt light bulb has a 400 hour life expectency means it will consume

60×400/1000 = 24 KWh units of electricity. Let us suppose each unit of electricity costs is 10 cents.

Then 24×10 = 240 cents  = $2.40

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Answer:

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class Main {

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   String email = "[email protected]";

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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

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   }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

   }

 }

}

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