Answer:
Explanation:
There were many factors that contributed to the shrinking of the american middle class in the 1970s, first of all the the emergence of the low-wage service sector (mainly blue collar job positions) and on the other hand a greater demand for higher-skill jobs for top companies which led to an expanding income gap between the highest paid executives and employees in the middle ranks
His innovations as the phonograph, the incandescent light bulb and one of the earliest motion picture cameras. He also created the world's first industrial research laboratory.
In 2015 it was estimated 46,282,080 backs in the us
Answer:
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Answer:
Interchangeable parts
Explanation:
Verified answer
It was the innovation of "interchangeable parts" that allowed for the mass production of goods, since the parts required to build a certain item could be imported from anywhere and replaced. pls Mark me as brainliest trust me
