Question

If a chain reaction starts with one neutron and the multiplication factor (k) is 1.2, how many neutrons will their be after 500 generations (n=500)?

Answer 1

we know that
the formula to calculate the number of neutrons after n generations is

Nn=N0. (k)^n
where
N0=1
k=1.2
n=500
therefore

N500=(1). (1.2)^500-------------- 3.8960e+39

the answer is
3.8960e+39 neutrons