can I have help solving this?

ect Question 1 0 / 1 pts A fisherman illegally drops some fish into a pond, and they quickly propagate (reproduce). The population growth of the new specifies is modeled by P(x) = 6b^x, where x is the time in weeks following the moment he dropped the fish into the pond and b is a positive unknown base. Exactly how many fish did the fisherman release into the lake? O 2 fish . 4 fish 6 fish not enough information