Forgive me if this is wrong. I haven't done stat in a year, but comment if you need clarification!
The standard deviation of 36,18,12,10 and 9 is 10
If I am understanding the question, and assuming the living room is a rectangle, then the border should be 80 ft
Answer:
A
Step-by-step explanation:
x=7
Answer:
82.5 ft²
Step-by-step explanation:
The area (A) of a trapezoid is calculated as
A =
h (b₁ + b₂)
where h is the perpendicular height and b₁, b₂ the parallel bases
Here h = 7.5, b₁ = 7 and b₂ = 15 , then
A =
× 7.5 × (7 + 15) = 0.5 × 7.5 × 22 = 82.5 ft²