<PRE><B>Question 1054323</B>
A) the function is negative for the average # of people served per hour is less than 9
:
B) 60 / 5 = 12 people served per hour
:
C) f(12) = 9 / (12(12-9)) = 9/36 = 1/4 = 15 minutes
:
D) 1/8 = 9 / (x(x-9))
x^2 -9x = 72
x^2 -9x -72 = 0
Use quadratic formula to solve for x
x = (9 + 19.20) / 2 = 14.10
x = (9 - 19.20) / 2 = -5.10
we want the positive value 14.10 approx 14 people
60 / 14 = 4.2857 minutes service time
Add another employee and another service window
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