If the number of bacteria in a colony doubles every 310 hours and there is currently a population of 10,000 bacteria, what will the population be 930 hours from now?

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?