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OpenStudy (anonymous):
) An advertising firm has an old computer that can prepare a whole mailing in 6 hours. With the help of a newer model the job can be completed in 2 hours. How long would it take the newer model to do the job alone?
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OpenStudy (amistre64):
define the unit rates for each computer ...
OpenStudy (amistre64):
if it takes 6 hours to do a job, how much of the job is done in an hour?
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