A given field mouse population satisfies the differentialequation
dâ¢p/dâ¢t=0.2p-390.
where p is the number of mice and t is thetime in months.
(a) Find the time at which the population becomesextinct if
   p(0)=1940â¢â€‰â€‰â€‰.
Round your answer to two decimal places.
tf=
(c) Find the initial population p0 if thepopulation is to become extinct in 1 year.
Round your answer to the nearest integer.
 p0â¢= 
