Recall the definition of the area of a circle that is given by
[tex]A=\pi r^2[/tex]Since we have the diameter of the circle, the radius is 3in. So,
[tex]A=(3.14)3^2=(3.14)9=28.26[/tex]Now, to find the circumference
[tex]C=D(3.14)=(6in)(3.14)=18.84[/tex]Where D is the diameter. Thus, the area is 20.26 square inches and the circumference is 18.84 inches