I don't know if you have any other information, but it looks like the corner of the house is at the center of the circle, making 20 the radius. The dog can only ever be 20 feet away from the house. With the information given, that is all you can find.
There is a 26 percent chance of picking one since there are only 2 colors black and red
Answer: 
Step-by-step explanation:
To solve for y, we want to isolate y.
[multiply both sides by y]
[subtract both sides by 3y]
[factor out y]
[divide both sides by (w-3)]

Now, we know that
.
Answer: B
Step-by-step explanation:
9.62112750.....
area = πr²
3.5 ÷ 2 = 1.75
1.75² × π = 9.6211250....
= 9.6 ft²