Question
The cost of purchasing x meter lengths of a certain rope is:
C=1/5x^2-8x+100 per rope.
What is the length of the cheapest rope that can be purchased?
C=1/5x^2-8x+100 per rope.
What is the length of the cheapest rope that can be purchased?
Answers
Steve
minimum cost is at the vertex of the parabola, which occurs at x = 8/(2/5) = 20