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? m (b) How much wire should be used for the square in order to minimize the total area?

Algebra for College Students
10th Edition
ISBN:9781285195780
Author:Jerome E. Kaufmann, Karen L. Schwitters
Publisher:Jerome E. Kaufmann, Karen L. Schwitters
Chapter9: Polynomial And Rational Functions
Section9.4: Graphing Polynomial Functions
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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?
m
(b) How much wire should be used for the square in order to minimize the total area?
m
Enhanced Feedback
Please try again and draw a diagram. Keep in mind that the area of a square with edge a is Ag = a2 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 = x + y. Rewrite the total area A = A, + At 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? m (b) How much wire should be used for the square in order to minimize the total area? m Enhanced Feedback Please try again and draw a diagram. Keep in mind that the area of a square with edge a is Ag = a2 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 = x + y. Rewrite the total area A = A, + At 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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