Please help me solve the following A farmer has 40 m of fencing with which to enclose a rectangle pen. Given the pen is x cm wide, a). show that the area is (20x -x^2)m^2 b) Deduce the maximum area that he can enclose.
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Originally Posted by mazy22a Please help me solve the following A farmer has 40 m of fencing with which to enclose a rectangle pen. Given the pen is x cm wide, a). show that the area is (20x -x^2)m^2 b) Deduce the maximum area that he can enclose. perimeter, if you graph the area function, it will look like an inverted parabola. the maximum will be located at the parabola's vertex. Do you know how to find the x-value for the vertex of a parabola?
yeh maximum is 100 m^2 worked it out by completing the square on - X^2 - 20x cheers mate
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