You didn't give us the equation, but circle equations are in the form;
(x-h)^2 + (y-k)^2 =r^2 where h and k are the x and y coordinate of the center and r is the radius of the circle squared.
The ratio of their area is 9/4
<h2>
Explanation:</h2>
We use ratios to compares values. In this exercise, we are comparing the circumference of two circles, which is:

and we want to know what is the ratio of their area. Recall that the circumference of a circle is given by:

If we define:

Then, the ratio of the circumference of two circles is 3:2 is:

The area of a circle is given by:

So the ratio of their area can be found as:

So:

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Answer:

Step-by-step explanation:





Hope this helps :)
Alright, so let's make the length x and the width y. 2y=x, and xy=area. 2x+2y=perimeter. Plugging 2y=x into the perimeter equation, we get that 3x=perimeter=126, and x=126/3=42
Length=42ft, width=21ft
Answer:
the second one(20)
Step-by-step explanation:
If you pretend 20 is x, you solve the equation by pluging in x (20) into the equation and it gives you 70, 70 is what the big part is and 70+20 is 90, which is the size of a 90degree side.
4(20)-10
80-10
70
70+20=90