Phil put a fence around a rectangular flower bed with the length of 18 feet and a width of 4.5. next, he enclosed a square flower bed that had the same area. what number of the feet of the fence did he need to enclose the entrire square flower?

  36 ft

Step-by-step explanation:

The area of the rectangular bed is ...

  (18 ft)(4.5 ft) = 81 ft^2

so the square bed with that area will have sides that are √(81 ft^2) = 9 ft.

Four such sides will require ...

  4·9 ft = 36 ft

of fence.

the correct answer is the second option