That is because b to any power = 1,
1^1 = 1, 1^0 = 1 1^0.25 = 1 etc
You are given the function 
Express t:

This expression gives the month t in terms of the price p.
b is cheaperrrrrrrrrrrrrrrrrrrrrrrrrrrrr
To determine the number of days that an employee work in a week, we simply use dimensional analysis and multiplying the number of works per week with the number of weeks in total for a year. That is,
employee works = (5 days per week)(49 weeks per year)
=245 days