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Robert works in a toll booth. About 18 to 23 cars pass through Robert's booth every 23 minutes. Which is a reasonable estimate for the number of cars that pass through Robert's booth in 69 minutes?
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Robert works in a toll booth. About 18 to 23 cars pass through Robert's booth every 23 minutes. Which is a reasonable estimate for the number of cars that pass through Robert's booth in 69 minutes?

User Diegocr
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A reasonable number between 18 and 23 is 20. 69 minutes is 3 times 23 minutes, so we multiply the 20 by 3, getting an estimate of 60 cars.

User Richardgirges
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