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  2. Speed limits in the United States by jurisdiction - Wikipedia

    Speed limits in the United States vary depending on jurisdiction. Rural freeway speed limits of 70 to 80 mph (113 to 129 km/h) are common in the Western United States, while such highways are typically posted at 65 or 70 mph (105 or 113 km/h) in the Eastern United States.

  3. Grading systems by country - Wikipedia

    Some universities follow a model based on the British system. Thus, at the University of Cape Town and the University of South Africa (UNISA), the percentages are calibrated as follows: a first-class pass is given for 75% and above, a second (division one) for 70 - 74%, a second (division two) for 60% - 69%, and a third for 50 - 59%.

  4. Standard deviation - Wikipedia

    A little algebra shows that the distance between P and M (which is the same as the orthogonal distance between P and the line L) (¯) is equal to the standard deviation of the vector (x 1, x 2, x 3), multiplied by the square root of the number of dimensions of the vector (3 in this case).

  5. Sexism - Wikipedia

    For example, the character for man is linked to those for positive qualities like courage and effect while the character for wife is composed of a female part and a broom, considered of low worth. Gender-specific pejorative terms. Gender-specific pejorative terms intimidate or harm another person because of their gender.

  6. Economic history of the United States - Wikipedia

    In 1860, there were 4.5 million Americans of African descent, 4 million of which were slaves, worth $3 billion. They were mainly owned by southern planters of cotton and sugarcane. An estimated 60% of the value of farms in Alabama, Georgia, Louisiana, Mississippi and South Carolina was in slaves, with less than a third in land and buildings.