



 
Hi Mary, The area of a rectangle is the length times the width. Suppose the length of the rectangle is $x$ feet then the rectangle has two sides of length $x$ feet so the remaining fencing is $100  2x$ feet. This is used for the remaining two sides of the rectangle so these sides are of length $\large \frac{100  2x}{2} = 50  x$ feet each. Use these dimensions, $x$ feet by $50  x$ feet to write an expression for the area of the rectangle. What value of $x$ makes this a maximum? Penny  


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