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Problem-Solving and Data Analysis / Ratios, rates, proportional relationships, and units Difficulty: Easy

A printer produces posters at a constant rate of $42$ posters per minute. At what rate, in posters per hour, does the printer produce the posters?

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Explanation

The correct answer is $2,520$ . There are $60$ minutes in one hour. At a rate of $42$ posters per minute, the number of posters produced in one hour can be determined by $(\frac{42 posters}{1 minute}) (\frac{60 minutes}{1 hour})$ , which is $2,520$ posters per hour.