This was because mules were the driving force behind it, meaning they pulled boats and mine cars. They also helped drive the coal industry to success, being chosen over horses because of their strength.
Answer:
A supply curve is usually upward-sloping, reflecting the willingness of producers to sell more of the commodity they produce in a market with higher prices. Any change in non-price factors would cause a shift in the supply curve, whereas changes in the price of the commodity can be traced along a fixed supply curve.
Explanation:
Most Southerners believed they were naturally better than African Americans and therefore had the right to "own" them, while many Northerners thought it was morally wrong, but some Northerners didn't want the competition of enslaved labor.
Answer: "We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness."
Explanation: