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 1124849: 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 josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+C%28x%29+=+x%5E2+-+70x+%2B+4400+
Given:
+C%28x%29+=+7400+
+7400+=+x%5E2+-+70x+%2B+4400+
+x%5E2+-+70x+-+3000+=+0+
+%28+x+-+100+%29%2A%28+x+%2B+30+%29+=+0+ ( by looking at it )
+x+=+100.+ ( x must be positive )
A is the answer