Ask Question
1 October, 12:52

Suppose you have 54 feet of fencing to enclose a rectangular dog pen. The function a=27x-x^2, where x=width, gives you the area of the dog pen in square feet. What width gives you the maximum area? Round to the nearest tenth as necessary.

+3
Answers (1)
  1. 1 October, 14:09
    0
    For maximum area, we take first derivative and then equalize it to zero

    A (x) = 27x - x^2

    A' (x) = 27 - 2x

    Set that equal to zero and solve for x:

    27 - 2x = 0

    27 = 2x ... [ added 2x to both sides ]

    13.5 = x ... [ divided both sides by 2 ]

    So the area will be

    A = 27 (13.5) - (13.5) ^2

    = 364.5 - 182.25

    = 182.3 ft^2
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “Suppose you have 54 feet of fencing to enclose a rectangular dog pen. The function a=27x-x^2, where x=width, gives you the area of the dog ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers