Answer:
Dude is it not written there in your book?
Each take on one task for the President so that he does not have to overload himself with work.
What new type of jazz music developed in the 1930's amidst the Depression?
<u>swing</u>
Explanation:
The spinning jenny increased wool mill productivity
The Cotton Gin a cotton machine that quickly easily seperates cotton fibers from their seeds
The telegraph
The first modern battery by volta