For this case we have that by definition, the area of a circle is given by:

Where:
r: It is the radius of the circle
As data we have that
Then, replacing we have:

Taking 
A = 113.04
So, the pool area is 
Answer:

24x^2+32x is going to be when you distribute the 8x into the parentheses.
In order to solve this problem you need to do the following:
3 days = 2 blankets
14/2=7= 7 days
so it will take 7 days for Grandma Jean to make 14 blankets.
:)
He buyed 240 cards because
20
x
12
-----
40
+
20
-------
240