SOLUTION: The cost C(x) for manufacturing x units of a product is given by the formula C(x) = x2 - 70x + 4400. Find the number of units manufactured at a cost of $7400. A. 100 uni

Algebra ->  Finance -> SOLUTION: The cost C(x) for manufacturing x units of a product is given by the formula C(x) = x2 - 70x + 4400. Find the number of units manufactured at a cost of $7400. A. 100 uni      Log On


   

Question 1124832: The cost C(x) for manufacturing x units of a product is given by the formula C(x) = x2 - 70x + 4400. Find the number of units manufactured at a cost of $7400.

A. 100 units
B. 110 units
C. 40 units
D. 30 units
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
C(x)=x^2-70x+4400=7400
so x^2-70x-3000=0
(x-100)(x+30)=0
x=100, only positive root.
A
check 10000-7000+4400=$7400