Where did this formula from the second law of thermodynamics come from and what is the reasoning behind it?

Hurrya vegetable garden and a surrounding path are shaped like a square that together are 11ft wide. the path is 2ft wide if one bag of gravel covers 9 square feet how many bags are needed to cover the path

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.

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