SOLUTION: The cost C (in dollars) of manufacturing x cell phones is given by: C(x) = 5x^2 - 200x + 4000. How many cell phones should be manufactured to minimize the cost? a. 2000

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Question 42979: The cost C (in dollars) of manufacturing x cell phones is given by:
C(x) = 5x^2 - 200x + 4000.
How many cell phones should be manufactured to minimize the cost?
a. 2000
b. 400
c. 100
d. 20
e. None of the others

Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
Find vertex:
5x^2 - 200x + 4000
v(20,2000)
+graph%28+600%2C+600%2C+-5%2C+20%2C+-100%2C+5000%2C+5x%5E2+-+200x+%2B+4000%29+