patrickthanh4 patrickthanh4

10-01-2017
Mathematics

contestada

An elevator starts on the 100th floor of a building. It descends 4 floors every 10 seconds. at what floor will the elevator be 60 seconds after it starts?

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NazarNemy NazarNemy

10-01-2017

it will be on floor 76.

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mojocosplay mojocosplay

10-01-2017

after 60 sec. at floor 79

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