Which innovation extended the number of hours in a day that Americans could work and play

asked Jun 26, 2016 184k views

2 votes

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4 votes

hello!

the answer is electricity

Batanichek answered Jun 28, 2016

8.5k points

2 votes

Its 24 hours in a day. And what you need is 9 hours of sleep. Si if you try and find the equality what would your estimate be

Blagae answered Jun 30, 2016

7.3k points

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