Answer:
(a) 1610 units
(b) 915 units
Step-by-step explanation:
p = 5000(1 - 4/4 + e^-0.002x)
(a) p = $200
200 = 5000(1 - 1 + e^-0.002x)
200/5000 = e^-0.002x
e^-0.002x = 0.04
-0.002x = In 0.04 = -3.22
x = -3.22/-0.002 = 1610 units
(b) p = $800
800 = 5000(1 - 4/4 + e^-0.002x)
800/5000 = e^-0.002x
e^-0.002x = 0.16
-0.002x = In 0.16 = -1.83
x = -1.83/-0.002 = 915 units