Answer:
[tex]\large\boxed{P=(16+36x)\ ft}[/tex]
Step-by-step explanation:
The formula of an area of a rectangle:
[tex]A=bh[/tex]
b - base
h - height
We have A = 144x ft² and h = 8. Substitute and solve for b:
[tex]144x=8b[/tex] divide both sides by 8
[tex]b=18x\ ft[/tex]
The formula of a perimeter of a rectangle:
[tex]P=2b+2h[/tex]
Substitute:
[tex]P=2(18x)+2(8)=36x+16[/tex]
