Final answer:
The perimeter of a rectangle with given dimensions can be found by substituting the value of the length into the width expression and then using the formula 2 * (length + width).
Step-by-step explanation:
Your question seems to relate to the concept of finding the perimeter of a rectangle. The perimeter of a rectangle is determined by doubling the sum of the length and width. If a rectangle has a length of x and a width of
, and we know the length is 5 feet, we can find the perimeter by plugging in the value of x into the expression for the width. However, there seems to be an issue with the width's expression; there should be an operator between
Assuming there's a typo, let's consider the width is correctly written as
![5x^3 + (4 - x^2).](https://img.qammunity.org/2019/formulas/mathematics/high-school/9gdicqmbsir3pjc4amsv5xkei8npcfr6gr.png)
To find the width, replace 'x' with '5':
![Width = 5(5)^3 + (4 - (5)^2) = 5(125) + (4 - 25) = 625 - 21 = 604 feet.](https://img.qammunity.org/2019/formulas/mathematics/high-school/w0dxkgx1x5ise0kjekgdwscju0dsou37em.png)
Then, compute the perimeter:
Perimeter = 2 * (length + width) = 2 * (5 + 604) = 2 * 609 = 1218 feet.
This gives us the perimeter of the rectangle when the length is 5 feet.