document.write( "Question 103142: a virus scanning program is checking every file for viruses. it has completed 40% of the files in 300 seconds. how long would it take to check all the files?
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Algebra.Com's Answer #74991 by HyperBrain(694)\"\" \"About 
You can put this solution on YOUR website!
If 40% is done in 300 seconds, then 1% is done in 300/40 seconds or 7.5 seconds.
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