Question 1157519
{{{y=120(1.18)^x}}}
x is number of weeks, and 1 year is 52 weeks.


(a)

{{{y=120*1.18^52}}}

{{{y=656214}}}


(b)

Already shown.
120 termites initially, and 656214 termites after 1 year.



(c)

Tdouble
?


If you are interested in the doubling-time, then
{{{240=120(1.18)^x}}}
{{{2=1.18^x}}}
{{{log((2))=x*log((1.18))}}}

{{{x=log((2))/log((1.18))}}}

{{{x=4.187}}} {{{weeks}}}

29 days to the nearest whole number