Question 74860
If you drew a picture, you would see that the sides of the square equal the diameter (2r) of the circle. So the area of the circle is:
{{{A=pi*r^2}}}
{{{A=pi*3^2}}}
{{{A=9pi}}}
The area of the square is:
{{{A=L*w}}}
{{{A=2r*2r}}}
{{{A=4r^2}}}
{{{A=4(3)^2}}}
{{{A=36}}}
So the area of the corners of the square is the difference of the circle and the square.
{{{Area_of_corners=(Area_of_square)-(Area_of_circle)}}}
{{{Area_of_corners=(36)-(9pi)}}}
{{{Area_of_corners=36-9(3.14)}}}Since we're using 3.14 for pi then plug in 3.14 
{{{Area_of_corners=36-28.26}}}
{{{Area_of_corners=7.74}}}
So the area of the corners is 7.74 sq units which means the answer is c)