A certain population of bacteria doubles every10 minutes. If the number of bacteria in the population initially was~$10^4$~, what was the number in the population 1 hour later?

2(~$10^4$~)

6(~$10^4$~)

(~$2^6$~)(~$10^4$~)

(~$10^6$~)(~$10^4$~)

(104)6