The european age of exploration would not have been possible without the astrolabe and the compass both of which were adapted from Muslim sailors because the compass and the astrolabe have been dicovered by muslim scholars
Answer:
Urban commuting evolved to mass and rapid transit in the late 1800s.
Explanation:
The Industrial Revolution led to commuting. Before that most people lived and worked in the countryside. Travel was rarely needed and it was expensive. However, throughout centuries the concept of commuting has existed and improved till today.
By the late 1800s, people needed a form of mass transit to make commuting efficient. In 1867, elevated railroads were created above urban neighborhoods, laying the groundwork for the first form of rapid transit. After that in 1888 the world's first electric streetcar was used in commuting. Each streetcar was powered by multiple-unit control, allowing for greater speed and acceleration.
Remove the sqrt. So put both sides to the power of 2. Then -a and +b. You would get option B. C=9-a+b
