A piece of wire 8 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral triangle. (a) How much wire should be used for the square in order to maximize the total area? 8 (b) How much wire should be used for the square in order to minimize the total area? 4.52 m

Calculus: Early Transcendentals
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Author:James Stewart
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Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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A piece of wire 8 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral
triangle.
(a) How much wire should be used for the square in order to maximize the total area?
8
m
(b) How much wire should be used for the square in order to minimize the total area?
4.52
m
Enhanced Feedback
Please try again and draw a diagram. Keep in mind that the area of a square with edge a is Ag = a? and the area of an
equilateral triangle with edge b is At =.
Let x be the perimeter of the square, which means x = 4a, and y be the
4
perimeter of the triangle, which means y = 3b. Find a relationship between x and y, considering that the wire's length / is
a constant and 1 = x + y. Rewrite the total area A = Ag + A, as a function of one variable. Use calculus to find the edges
of the square and the triangle that maximize the area; then find the edges that minimize the area.
Transcribed Image Text:A piece of wire 8 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral triangle. (a) How much wire should be used for the square in order to maximize the total area? 8 m (b) How much wire should be used for the square in order to minimize the total area? 4.52 m Enhanced Feedback Please try again and draw a diagram. Keep in mind that the area of a square with edge a is Ag = a? and the area of an equilateral triangle with edge b is At =. Let x be the perimeter of the square, which means x = 4a, and y be the 4 perimeter of the triangle, which means y = 3b. Find a relationship between x and y, considering that the wire's length / is a constant and 1 = x + y. Rewrite the total area A = Ag + A, as a function of one variable. Use calculus to find the edges of the square and the triangle that maximize the area; then find the edges that minimize the area.
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