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A delivery person uses a service elevator to bring boxes of books up to an office. The delivery person weighs 160 lb and each box of books weighs 40 lb. The maximum capacity of the elevator is 670 lb. How many boxes of books can the delivery person bring up at one​ time?

 Aug 27, 2020
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The delivery person can bring up 8 boxes at a time.

 Aug 27, 2020

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