
(a)
To find: The formula for the
(a)

Answer to Problem 18E
The volume of the box is
Explanation of Solution
Given:
The given diagram is shown in Figure 1
Figure 1
Calculation:
Consider the dimension of the base is
Then, the volume of the box is,
(b)
To find: The domain of
(b)

Answer to Problem 18E
The domain is
Explanation of Solution
Calculation:
Consider the range required to make the box is,
Consider the interval is
The graph is shown in Figure 2
Figure 2
(c)
To find: The maximum value and the value of
(c)

Answer to Problem 18E
The maximum value is at
Explanation of Solution
Calculation:
Consider that the maximum value is obtained at
Then,
(d)
To find: The confirmation for the result of part (c).
(d)

Answer to Problem 18E
The maximum value occur at
Explanation of Solution
Calculation:
Consider the maximum value occur at,
Thus, it is clear that the maximum value occur at
Chapter 5 Solutions
Calculus 2012 Student Edition (by Finney/Demana/Waits/Kennedy)
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