In a pie chart, the population of a city is represented by 45. If the country has a population of 10 million people, then the city's population is?

To solve this problem, we need to first understand what a pie chart is and how it works. A pie chart is a circular graph that is divided into sectors, with each sector representing a proportion of the whole. The size of each sector is proportional to the quantity it represents, so we can use it to determine the percentage or fraction of the whole that each quantity represents.

In this case, the city's population is represented by 45 degrees of the pie chart. If we assume that the pie chart represents the entire country's population, which is 10 million people, then the fraction of the country's population represented by the city is:

45 degrees / 360 degrees = 1/8

This means that the city's population is 1/8 of the entire country's population. To find out the actual population of the city, we can multiply the fraction by the total population:

(1/8) x 10 million = 1.25 million

Therefore, the correct answer is 1.25 million.