31. A population of mice is at its lowest in January (t = 0) and oscillates 23 above and below an average of 149 during the year. Find an equation for the population. P, in terms of the months since January, t. O 23 cos(%[t - 3)) + 149 O 465mg: 1)) + 126 46 cos(%[t 1)} -l 126 23 3mg: 3)) + 149 000 None of these answers are correct