Marquise has 200 meters of fencing to build a rectangular garden.The garden's area (in square meters) as a function of the garden's width x (in meters) is modeled by:A(x)=−x2+100xWhat is the maximum area possible?square meters
Q. Marquise has 200 meters of fencing to build a rectangular garden.The garden's area (in square meters) as a function of the garden's width x (in meters) is modeled by:A(x)=−x2+100xWhat is the maximum area possible?square meters
Area Function Analysis: The problem gives us the area function A(x)=−x2+100x, where x is the width of the garden. To find the maximum area, we need to find the vertex of the parabola represented by this quadratic function, since the coefficient of x2 is negative, indicating that the parabola opens downwards and thus has a maximum point.
Vertex Form Calculation: The vertex form of a quadratic function is A(x)=a(x−h)2+k, where (h,k) is the vertex of the parabola. To find the vertex of the parabola given by A(x)=−x2+100x, we can use the formula h=−2ab, where a is the coefficient of x2 and b is the coefficient of x.
Calculate Vertex Coordinates: In our function A(x)=−x2+100x, a=−1 and b=100. Plugging these values into the formula h=−2ab, we get h=−2∗(−1)100=−−2100=50.
Find Maximum Area Width: The x-coordinate of the vertex, h, is the width that gives us the maximum area. Since h=50, the width of the garden that gives the maximum area is 50 meters.
Substitute Width into Area Function: To find the maximum area, which is the y-coordinate of the vertex, k, we substitute the x-coordinate of the vertex back into the original area function. So we calculate A(50)=−(50)2+100(50).
Calculate Maximum Area: Calculating A(50) gives us A(50)=−2500+5000=2500 square meters. This is the maximum area possible for the garden.
Final Result: We have found the maximum area of the garden to be 2500 square meters when the width is 50 meters.
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