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A piece of wire 40 cm long is to be used to form the perimeters of a square and a circle in such a way as to make the total area a maximum. If the radius of the circle is r, then the circumference of the circle is 2 pi r. A length of 40 - 2 pi r is left for the four sides of the square. (2 pts.) The total area is A = .(3pts.)dA / dr = Find the value for r that will make the total area a maximum. What is the area of the square?