The population of a certain city was 50,000 people one year later the population of the same city grew to 50600 what was the percent increase in the city's population that one year period

Consider u = {x|x is a negative real number}which is an empty set? o {x|x eu and x has a negative cube root}o {x|x eu and x has a negative square root}{x|x eu and x is equal to the product of a positive number and -1}{x|x eu and x is equal to the sum of one negative and one positive number?