Answer:
2 equivalent expressions w/ negative signs in different places.
a) 
=-1/5 x and x/-5
b) 
=14/-y and -14/1/y
c) 
=a/1/b and 1/b/1/a
d) 
=-c/y and -c/1/y
I think that it gets smaller. (not entirely sure)
I believe you meant "why is the number of shifts multiplied by approximately 4.5 to obtain the total number of operators required to run the plant"
Answer and Explanation:
There are 3 shifts per day, 49 weeks per year and 5 shifts per operator per week
To get total number of operators required to run the plant, we multiply number of shifts in a year by number if operators per shift.
49 weeks×5 shifts= 245 shifts per operator per year
365×3 shifts= 1095 shifts per year
1095/245=4.5 operators per shift
total number of operators required to run the plant(per day) = 4.5×3= 13.5 approximately 14
total number of operators required to run the plant(per year) =4.5×1095=4927.5 approximately 4928
