Given a rectangle with sides "a" and "b":
The area (A) of the rectangle is:
[tex]A=ab[/tex]
And the perimeter (P) is:
[tex]P=2a+2b[/tex]
Given the sides:
a = 28 ft
b = 13 ft
(A)
The area is:
[tex]\begin{gathered} A=28ft*13ft \\ A=364ft^2 \end{gathered}[/tex]
The perimeter is:
[tex]\begin{gathered} P=2*28ft+2*13ft \\ P=56ft+26ft \\ P=82ft \end{gathered}[/tex]
(B)
All the area of the lawn will the molded, thus the area must be used.
(C)
The rope will cover only the surroundings, thus the perimeter must be used.
