Practice Final 2

1. 0.36 / hr

2. decrease (because increased variance, increases the average waiting time).

3. distribution of the demand, profit per book sold, cost of unmet demand (maybe the cost of a rush order)

4.
a) min sum_i yi
s.t.	yi >= xi/5 for all i
	| A x - b | <= 1
	5 >= xi >= 0 for all i
	yi binary for all i

b) min sum_i yi
s.t.	yi >= xi/5 for all i
	A x - b  <= 1
	b - A x <= 1
	5 >= xi >= 0 for all i
	yi binary for all i

5. 
a) 23%
b) 17.6 minutes