Also, 34÷2-8? ≤9m；

6m & lt9m

Therefore, the circumference of a rectangle = (6+8) × 2 = 28m;

2)、

1, Chicken A = (4500-2000× 2) ÷ (3-2) = 500;

B chicken = 2000-500 =1500;

2.a = 500÷94%≈532；

b = 1500÷99%≈ 15 16