Will fan and medal. How is this correct?3. A family is building a circular fountain in the backyard. The yard is rectangular and measures 7x by 6x and the fountain is going to be circular with a radius of 2x. Once the fountain is build, what will be the area of the remaining yard?A. 38x^2B. [x] 2x^2 (21 – 2pi)C. 42x^2 – 2pix^2D. 38pix^2,

The yard is rectangular with a measurement of 7x by 6x. 
The fountain is circular with a radius of 2x.
Since we are looking for the remaining area, we need to know the area of the rectangular backyard and the circular fountain.

The formula for a rectangle is 
A=lw
where:
 l=length
 w=width 

So, 
A=(7x)(6x)
  =42x^2

Now for the area of the circular fountain, 
A=