You can put this solution on YOUR website! 1 megabyte is 1000 kilobytes. the computer runs 500 megabites a second. how long will it take for 260 kilobites
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It's a nonsensical statement.
Computers run at 500 megacycles per second, or 500 megahertz. Not bytes.
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Ignoring that:
260 KB = 0.26 MB
It would take 0.26/500 seconds
= 0.52 milliseconds