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
 
        
             
        
        
        
Decimals are based on the preceding powers of 10. Thus, as we move from left to right, the place value of digits gets divided by 10, meaning the decimal place value determines the tenths, hundredths and thousandths. A tenth means one tenth or 1/10. In decimal form, it is 0.1.
        
             
        
        
        
<h2>
My Answer:</h2>
FTP: The definition on Wikipedia is; "The File Transfer Protocol (FTP) is a standard network protocol used for the transfer of computer files between a client and server on a computer network."
So, if the question is asking for technology that provides a method for two computers hooked to the internet transfer files back and forth between each other, so if we can sum it up the answer which makes the most sense is <em>FTP</em>.
~TheExpertNerd