Answer:
<h3>Plessy v. Ferguson case.</h3>
Explanation:
- The Plessy v. Ferguson case of 1896 ruled out that segregation was constitutional as long as both blacks and whites enjoyed opportunities that were separate but equal.
- However, the Supreme Court's verdict in the Plessy v. Ferguson case of 1896 was challenged by Justice Earl Warren stating that the idea of ‘separate but equal’ in public school was unconstitutional and inherently unequal.
- Thus, Chief Justice Earl Warren issued the Supreme Court’s unanimous decision in Brown v. Board of Education, ruling that racial segregation in public schools violated the "Equal Protection Clause” of the 14th Amendment.
C? Least useful information, and includes an opinion, both uncomforting and personal.
Earth takes in thermal energy from the Sun in a process called thermal radiation. The angle between the direction of the energy and the surface it is striking is called the angle of incidence.
In 1931, the Japan invasion of Manchuria persuaded the Chinese Communist Party and the warlords to unite with the Kuomintang.
<h3>What was the effect of Communism?</h3>
In the year 1931, Japan invaded Manchuria immediately after the Mukeden incident and then installed Manchuko state.
This invasion by the Japanese army on Manchuria was because they felt that a Chinese lieutenant destroyed the South Manchuria Railway by a detonating dynamite.
The imperial Japanese army responded with a full invasion which caused a truce between the Kuomintang and communist party of china, they cooperated against the Japan.
Read more baout Communism at; brainly.com/question/11981920
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The code chunk that lets the analyst create the phone_number column is: unite(customers, "phone_number", area_code, phone_num, sep="-"
<h3>What is a data frame?</h3>
A data frame refers to a two-dimensional array-like structure or table that is made up of rows and columns, which is typically used for storing data in R Studio using the R programming language.
In Computer programming, a data frame is a list of vectors that are all equal in length, and each column consist of values of one variable while each row consist of a set of values from each column.
<h3>The executable code in R Studio.</h3>
In this scenario, the code chunk that would be used to create a data frame that combines the two columns into a single column (phone_number) is:
- unite(customers, "phone_number", area_code, phone_num, sep="-"
Read more on data frame here: brainly.com/question/25558534
