A, 20.
The vigesimal numbering system, or base-20 numeral system, is based on the number twenty. Twenty individual numerals/digits are used, ten more than in the usual decimal system.
The best completion to the diagram on Jim Crow laws was that D. Public services become racially segregated.
<h3>What happened after Jim Crow laws were enacted?</h3>
Jim Crow laws were passed to subjugate African Americans and to keep them separate from White people.
As a result, segregation became the norm in the South with public services for both African Americans and Whites being different.
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One of the first environmental legislative acts enacted by a bipartisan Congress signed into regulation by Richard Nixon in 1970 was the Clean Air Act, which mandated government agencies to conduct environmental influence studies for building projects. The decade ended with a dangerous chemical happening at Love Canal, New York.
<h3 /><h3>What is EPA?</h3>
The Environmental Protection Agency stands as an independent executive agency of the United States federal government entrusted with environmental safety matters. President Richard Nixon proposed the structure of EPA on July 9, 1970; it began operation on December 2, 1970, after Nixon marked an executive order.
The Environmental Protection Agency (EPA) exists a federal government agency by the Nixon Administration desired at protecting human health and the environment.
When President Richard Nixon started the EPA, it existed assessed to fix acceptable national guidelines and to monitor and implement the guidelines for environmental protection. Thus, the Clean Air Act was enacted early in 1970, but the decade concluded with the Love Canal disaster.
One of the first environmental legislative acts enacted by a bipartisan Congress signed into regulation by Richard Nixon in 1970 was the Clean Air Act, which mandated government agencies to conduct environmental influence studies for building projects. The decade ended with a dangerous chemical happening at Love Canal, New York.
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Abraham Lincoln stopping slavery
