Answer:
To find the area of the rectangle, you would do length times width, so it would be (4+√3)(2-√3)
Then the area would be 5.732050808 which would round up to 5.73.
To find the perimeter you would do P=2(l+w), so you would have 2(4+√3)(2-√3)
Then you would get 11.46, which you would round up to 11.5.
All in all:
Area = 5.73
Perimeter = 11.5
Explanation: