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Mathematics 20 Online
OpenStudy (anonymous):

A production manager measures the lifetimes of 10 lightbulbs. The lifetimes she measures are 568, 342, 457, 423, 398, 412, 502, 375, 493, and 450 hours. The manager puts her list of bulb lifetimes in order, from the smallest number to the largest. What is the fifth number in her list?

OpenStudy (anonymous):

423

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