A rectangular window is surmounted by a semicircular window that is stained. The stained glass lets through as much of the light as the clear glass. The perimeter of the window is 24 feet. What dimensions of the window will maximize the amount of light that will come through the window?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
icon
Related questions
Topic Video
Question
A rectangular window is surmounted by a semicircular window that is stained. The
stained glass lets through
window is 24 feet. What dimensions of the window will maximize the amount of light that
will come through the window?
as much of the light as the clear glass. The perimeter of the
Use the following steps. They can be used to complete many applied optimization prob-
lems.
Understand the problem! What information is given? What information is asked for?
Can you tell that the given information does somehow determine the asked-for infor-
mation? Very often this step will require
diagram.
or at least be aided by
a picture or
|
Start to set up a pure math problem. In this step, you set up a pure mathematical
context that models the problem. Name and define all of the variables you'll be using.
Very often this step will require
that captures the mathematical content of the picture you have already drawn; some
variables can be defined by simply labeling your diagram.
or at least be aided by
an abstract diagram
Continue to formulate the pure math question. In this step, determine what you
are trying to maximize or minimize, and write it as an expression of the variables
you have named. (If you can't do this, consider if you need to have more variables.)
Very of en the auestion will be something like "For what value of y and v is A
Transcribed Image Text:A rectangular window is surmounted by a semicircular window that is stained. The stained glass lets through window is 24 feet. What dimensions of the window will maximize the amount of light that will come through the window? as much of the light as the clear glass. The perimeter of the Use the following steps. They can be used to complete many applied optimization prob- lems. Understand the problem! What information is given? What information is asked for? Can you tell that the given information does somehow determine the asked-for infor- mation? Very often this step will require diagram. or at least be aided by a picture or | Start to set up a pure math problem. In this step, you set up a pure mathematical context that models the problem. Name and define all of the variables you'll be using. Very often this step will require that captures the mathematical content of the picture you have already drawn; some variables can be defined by simply labeling your diagram. or at least be aided by an abstract diagram Continue to formulate the pure math question. In this step, determine what you are trying to maximize or minimize, and write it as an expression of the variables you have named. (If you can't do this, consider if you need to have more variables.) Very of en the auestion will be something like "For what value of y and v is A
Continue to formulate the pure math question. In this step, determine what you
are trying to maximize or minimize, and write it as an expression of the variables
you have named. (If you can't do this, consider if you need to have more variables.)
Very often the question will be something like "For what value of x and y is A=xy
largest?".
1
Use given information to refine your question. If you have multiple variables in step
3, this amounts to finding an equation (or equations) relating your variables ("con-
straints"). Often this equation is the result of geometrical relationships in your di-
agram. Use your constraint (s) to find a function of one variable to optimize and a
domain for that function. Your refined question will be something like "For what
values of x in [0, 10] is A(x) = (10 – x) largest?"
Solve the pure math problem. Generally, you differentiate to find critical numbers. Then
you analyze your function on its domain to find the location of its maximum or min-
imum value. Remember that we have made tables of function values (for continuous
functions on closed intervals) or graphs to help determine maximum and minimum
values. For functions that are not continuous or intervals that are not closed, we may
need to use information about the shape of the function from the first and second
derivative to determine if we are guaranteed a maximum or minimum value.
Answer the question(s) that were asked. You might have discovered that the maxi-
mum is 25 and occurs when x =
5, for example. You need to reformulate the answer
in the context of the problem: for example, “the room has maximum area when it is a
5 feet by 5 feet square, giving an area of 25 ft²."
Check that your answer (s) make sense. For example, "the room has maximum area
when it is 0 feet by 0 feet square" does not make sense if it is possible to have a room
with a positive area.
Transcribed Image Text:Continue to formulate the pure math question. In this step, determine what you are trying to maximize or minimize, and write it as an expression of the variables you have named. (If you can't do this, consider if you need to have more variables.) Very often the question will be something like "For what value of x and y is A=xy largest?". 1 Use given information to refine your question. If you have multiple variables in step 3, this amounts to finding an equation (or equations) relating your variables ("con- straints"). Often this equation is the result of geometrical relationships in your di- agram. Use your constraint (s) to find a function of one variable to optimize and a domain for that function. Your refined question will be something like "For what values of x in [0, 10] is A(x) = (10 – x) largest?" Solve the pure math problem. Generally, you differentiate to find critical numbers. Then you analyze your function on its domain to find the location of its maximum or min- imum value. Remember that we have made tables of function values (for continuous functions on closed intervals) or graphs to help determine maximum and minimum values. For functions that are not continuous or intervals that are not closed, we may need to use information about the shape of the function from the first and second derivative to determine if we are guaranteed a maximum or minimum value. Answer the question(s) that were asked. You might have discovered that the maxi- mum is 25 and occurs when x = 5, for example. You need to reformulate the answer in the context of the problem: for example, “the room has maximum area when it is a 5 feet by 5 feet square, giving an area of 25 ft²." Check that your answer (s) make sense. For example, "the room has maximum area when it is 0 feet by 0 feet square" does not make sense if it is possible to have a room with a positive area.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 4 steps

Blurred answer
Knowledge Booster
Optimization
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, advanced-math and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Advanced Engineering Mathematics
Advanced Engineering Mathematics
Advanced Math
ISBN:
9780470458365
Author:
Erwin Kreyszig
Publisher:
Wiley, John & Sons, Incorporated
Numerical Methods for Engineers
Numerical Methods for Engineers
Advanced Math
ISBN:
9780073397924
Author:
Steven C. Chapra Dr., Raymond P. Canale
Publisher:
McGraw-Hill Education
Introductory Mathematics for Engineering Applicat…
Introductory Mathematics for Engineering Applicat…
Advanced Math
ISBN:
9781118141809
Author:
Nathan Klingbeil
Publisher:
WILEY
Mathematics For Machine Technology
Mathematics For Machine Technology
Advanced Math
ISBN:
9781337798310
Author:
Peterson, John.
Publisher:
Cengage Learning,
Basic Technical Mathematics
Basic Technical Mathematics
Advanced Math
ISBN:
9780134437705
Author:
Washington
Publisher:
PEARSON
Topology
Topology
Advanced Math
ISBN:
9780134689517
Author:
Munkres, James R.
Publisher:
Pearson,