inakihernandez wrote:
The cost C, in dollars of producing x units of a certain commodity is given by the formula C(x) = 10.000 + bx + ax^2 where a, and b are constants. What is the value of a?
(1) The cost of producing 500 units is $15.833.
(2) The cost of producing 1,000 units is twice the cost of producing 500units.
1) 1 equation and 2 unknowns => Not sufficient
2) 10 + 1000b + a(1000)^2 = 2 (10 + 500b + a(500)^2)
b cancels out. We can find a. => Sufficient
ANSWER: B
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