The correct answer is B, as the winner of that election was the United States first African American president, Barack Obama.
The name is Pre-Cambrian era
After the conclusion of America's Civil War, President Abraham Lincoln pitched the ... These issues became more difficult to solve after President Lincoln was murdered.
The correct answer is: "He developed mathematical principles"
René Descartes (1596 – 1650) was a French philosopher, mathematician, and scientist who lived more than 20 years in the Dutch Republic and was one of the main figures of the Dutch Golden Age.
His great influence in mathematics has been his major contribution to the Scientific Revolution, although his work in philosophy is outstanding too. He developed the the Cartesian system of coordinates. He is considered the father of analytical geometry, which connects both algebra and geometry and which has been used in the development of infinitesimal analysis and calculus .
