Pi Day is observed on March 14 (3/14 in the month/day format) since 3, 1, and 4 are the first three significant digits of π. In 2009, the United States House of Representatives supported the designation of Pi Day.
Your answer would be <span>automobile industry.
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3. The Seventeenth Amendment altered the process for electing United States Senators and changed the way vacancies would be filled. Under the original constitutional provision, state legislatures filled vacancies when a Senator left office before the end of their term.
I have no clue about the others sorry to disappoint
