Chapter 1: Problem 49
A box of fixed volume \(V\) has a square base with side length \(x .\) Write a formula for the height, \(h,\) of the box in terms of \(x\) and \(V .\) Sketch a graph of \(h\) versus \(x .\)
Short Answer
Expert verified
The formula is \( h = \frac{V}{x^2} \).
Step by step solution
01
Understanding the Problem
The exercise asks us to express the height of a box in terms of its base side length and volume. The box has a square base, so we will use the formula for volume.
02
Volume Formula
Recall the formula for the volume of a rectangular prism or box: \[ V = ext{Base Area} \times ext{Height} \]Since the box has a square base, the base area is given by \( x^2 \). So the volume can be expressed as:\[ V = x^2 \times h \]
03
Solving for Height
We need to express the height \( h \) in terms of \( V \) and \( x \). Rearrange the volume equation to solve for \( h \):\[ h = \frac{V}{x^2} \]
04
Graphing Height Versus Side Length
To sketch the graph of \( h \) versus \( x \), note that \( h = \frac{V}{x^2} \) is an inverse square relationship. As \( x \) increases, \( h \) decreases quickly. The graph is a curve that approaches zero as \( x \) increases.
Unlock Step-by-Step Solutions & Ace Your Exams!
-
Full Textbook Solutions
Get detailed explanations and key concepts
-
Unlimited Al creation
Al flashcards, explanations, exams and more...
-
Ads-free access
To over 500 millions flashcards
-
Money-back guarantee
We refund you if you fail your exam.
Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!
Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Volume Formula
Understanding how to calculate the volume of a three-dimensional object is crucial in calculus and geometry. For this exercise, we're dealing with a box that has a square base, which simplifies calculations. The volume formula becomes quite straightforward:
- The base area of the square is calculated using its side length, given by \( x^2 \).
- The volume \( V \) is then computed as the product of the base area and the height \( h \): \( V = x^2 \times h \).
Inverse Function
The concept of inverse functions is a key idea in calculus. Here, we see its application in the expression \( h = \frac{V}{x^2} \). This relationship arises from rearranging the volume formula to solve for the height. It resembles an inverse function because:- \( h \) is inversely proportional to \( x^2 \).- As \( x \) increases, \( h \) decreases, which is a typical inverse relationship.This particular instance is more specifically an inverse square relationship, due to \( h \) depending on \( x^2 \). By understanding inverse relationships, you gain insights into how changes in one variable affect another in a mathematical model, which is a powerful tool for problem-solving in various scientific and engineering fields. It illustrates the interconnectedness of mathematical concepts through real-world applications.
Problem Solving
Successfully solving mathematical problems often hinges on understanding the relationships between variables and manipulating equations to isolate unknowns. In this exercise, problem-solving involves:
- Recognizing that the known quantities are the volume \( V \) and the side length \( x \) of the base, while the unknown is the height \( h \).
- Using algebraic manipulation to solve for \( h \) in terms of \( V \) and \( x \), which involves isolating \( h \) on one side of the equation.
Graphing Functions
The final step involves graphing the relationship between \( h \) and \( x \), which visually represents the problem's solution. Graphing functions is an essential skill because it:- Transforms abstract equations into tangible insights.- Allows you to observe how changes in variables affect others visually.For the equation \( h = \frac{V}{x^2} \), the graph describes an inverse square function, which slopes sharply downward as \( x \) increases. Here’s how to visualize it:
- At small values of \( x \), \( h \) is large since \( \frac{1}{x^2} \) is large.
- As \( x \) grows, \( h \) decreases quickly showing the steep decay in height.