A box with a square base and open top must have a volume of 415292 cm. We wish to find the dimensions of the box that minimize the amount of material used. First, find a formula for the surface area of the box in terms of only z, the length of one side of the square base. [Hint: use the volume formula to express the height of the box in terms of T.] Simplify your formula as much as possible. A(1) = Next, find the derivative, A' (T). A'(x) = %3D Now, calculate when the derivative equals zero, that is, when A'(x) 0. [Hint: multiply both sides by z -1 A'(x) = 0 when T = We next have to make sure that this value of x gives a minimum value for the surface area. Let's use the second derivative test. Find A"(x). A"(x) = Evaluate A"(T) at the x-value you gave above. NOTE: Since your last answer is positive, this means that the graph of A(I) is concave up around that value, so the zero of A'(x) must indicate a local minimum for A(x). (Your boss is happy now.)
A box with a square base and open top must have a volume of 415292 cm. We wish to find the dimensions of the box that minimize the amount of material used. First, find a formula for the surface area of the box in terms of only z, the length of one side of the square base. [Hint: use the volume formula to express the height of the box in terms of T.] Simplify your formula as much as possible. A(1) = Next, find the derivative, A' (T). A'(x) = %3D Now, calculate when the derivative equals zero, that is, when A'(x) 0. [Hint: multiply both sides by z -1 A'(x) = 0 when T = We next have to make sure that this value of x gives a minimum value for the surface area. Let's use the second derivative test. Find A"(x). A"(x) = Evaluate A"(T) at the x-value you gave above. NOTE: Since your last answer is positive, this means that the graph of A(I) is concave up around that value, so the zero of A'(x) must indicate a local minimum for A(x). (Your boss is happy now.)
Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter63: Volumes Of Pyramids And Cones
Section: Chapter Questions
Problem 25A
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![A box with a square base and open top must have a volume of 415292 cm. We wish to find the dimensions
of the box that minimize the amount of material used.
First, find a formula for the surface area of the box in terms of only z, the length of one side of the square
base.
[Hint: use the volume formula to express the height of the box in terms of T.]
Simplify your formula as much as possible.
A(1) =
Next, find the derivative, A' (T).
A"(x) =
%3D
Now, calculate when the derivative equals zero, that is, when A'(x)
0. [Hint: multiply both sides by z
-1
A'(x) = 0 when I =
We next have to make sure that this value of x gives a minimum value for the surface area. Let's use the
second derivative test. Find A"(x).
A"(x) =
Evaluate A"(T) at the x-value you gave above.
NOTE: Since your last answer is positive, this means that the graph of A(I) is concave up around that
value, so the zero of A'(x) must indicate a local minimum for A(x). (Your boss is happy now.)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F75df7aaf-f621-4522-8fea-7181ec6d2ac6%2F8a8f05c0-b83c-4cc4-b189-42c7788728e2%2Fd5kala_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A box with a square base and open top must have a volume of 415292 cm. We wish to find the dimensions
of the box that minimize the amount of material used.
First, find a formula for the surface area of the box in terms of only z, the length of one side of the square
base.
[Hint: use the volume formula to express the height of the box in terms of T.]
Simplify your formula as much as possible.
A(1) =
Next, find the derivative, A' (T).
A"(x) =
%3D
Now, calculate when the derivative equals zero, that is, when A'(x)
0. [Hint: multiply both sides by z
-1
A'(x) = 0 when I =
We next have to make sure that this value of x gives a minimum value for the surface area. Let's use the
second derivative test. Find A"(x).
A"(x) =
Evaluate A"(T) at the x-value you gave above.
NOTE: Since your last answer is positive, this means that the graph of A(I) is concave up around that
value, so the zero of A'(x) must indicate a local minimum for A(x). (Your boss is happy now.)
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