Answer:

Step-by-step explanation:
<u>Formula for circumference of a circle is</u>:
Circumference = 
<em>Given circumference of the ring is
</em>
<em>Now solving for the radius gives us:</em>

We know that area of a circle is
, substituting the value of r we found, we get the area as:
area (A) = 
Hence the Area (A), in terms of
is
Show the question so I can answer it for you.
Answer:
-0.65, -0.35, 4, 5
Step-by-step explanation:
The bigger the number is in negatives the farther the way it is away from 0, therefore making -0.65 the least number.
Answer:
The fraction of the pencils that are red is 4/10. The fraction of the pencils that are black is 6/10.
Step-by-step explanation:
[I can't draw you a model but I reccomend that when you do, you seperate it into 10 pieces and mark 4 as red pencils and 6 as black pencils. You could also simplify 4/10 to 2/5 and 6/10 to 3/5, but instead you'd seperate the model into 5 pieces and mark 2 as red pencils and 3 as black pencils.]
First, let's add this up so we have our denominator.
4 + 6 = 10.
Now that we know that the denominator is 10, we apply it to the question.
<em>The box has 4/10 red pencils and 6/10 black pencils.</em>
<em>The box has 4/10 red pencils and 6/10 black pencils.If you were to simplify, it'd be 2/5 red pencils and 3/5 black pencils.</em>