Questions on Algebra: Introduction to vectors, addition and scaling answered by real tutors!

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Question 147530: The cost C (in dollars) for a company to make x dozen units of a certain product is given by C = 0.1x^2 + 0.6x + 10. How many units can be made for $60?: The cost C (in dollars) for a company to make x dozen units of a certain product is given by C = 0.1x^2 + 0.6x + 10. How many units can be made for $60?
Answer by stanbon(18718) About Me  (Show Source):
You can put this solution on YOUR website!
The cost C (in dollars) for a company to make x dozen units of a certain product is given by C = 0.1x^2 + 0.6x + 10. How many units can be made for $60?
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60 = 0.1x^2 + 0.6x + 10
0.1x^2 + 0.6x -50 = 0
10x^2 + 60x -500 = 0
x = [-60 +- sqrt(3600 - 4*10*-500)]/20
x = [-60 +- 153.62..]/20
x = 4.6811... dozen units
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Cheers,
Stan H.