Area of A(40, 20), B(80, 20), C(100, 70), and D(40, 70)

2,500 units²

Step-by-step explanation:

These vertices will form a trapezoid

AB and CD are the parallel sides

And the height is 70 - 20 = 50

Lengths:

AB = 80 - 40 = 40

CD = 100 - 40 = 60

Area of the trapezoid:

½ × (40 + 60) × 50

2500 units²

the answer is 31.27mph

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540