astronomy question, please help me?

The total annual U.S. energy consumption is about joules.

What is the average power requirement for the United States, in watts? (Hint: 1 = 1 )

With current technologies and solar collectors on the ground, the best we can hope for is that solar cells will generate an average (day and night) power of about 190 . What total area would we need to cover with solar cells to supply all the power needed for the United States? Give your answer in both square meters and square kilometers.

I’m really stuck on this question and i have a test tomorrow in this. help would be greatly appreciated!! THANKS.


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