<span>0, (4) = 4/9 <span>L circle = 2πR </span><span>L circle = 2 · π · 4/9 </span><span>L circle = 8π / 9 cm
</span></span>L = 2 * pi * R
<span>L = 2 * pi * 0. (4) cm = 0. (8) pi cm</span>
Step-by-step explanation:
in this situation
A+B =D
The area of a circle is <span>πr²
the outer circle area = </span><span>π 4x²
the inside circle area = </span>π.6²=36<span>π
</span>the outer circle area - <span>the inside circle area = </span><span>he shaded region
</span>π 4x² - 36π =<span>220π cm2 it implies x²-9 =55 and x²=64, and x =sqrt(64)=8
the value of x is 8</span>
Answer: 4:1
Step-by-step explanation: I think the answer is 4:1. I think this because 20% of 2500, would be 500. So 2500-500=2000. So the ratio would be 2000:500. Then we simplify 2000:500, by dividing 2000 by 500, and dividing 500 by 500. 500 / 500 = 1. 2000 / 500 = 4, so the answer is 4:1. (I am sorry if I am incorrect)