Answer:
C 28.26
Step-by-step explanation:
Circumference is definded as:
[tex]c=2\pi r~~~~(1)[/tex]
Area is definded as:
[tex]A=\pi r^{2}~~~~(2)[/tex]
The unknown values are A and r, so we can solve (1) for r and replace it in (2)
[tex]r=\frac{c}{\pi }~~~~~(3)[/tex]
we replace (3) in (2) and we get
[tex]A=\pi (\frac{c}{\pi})^{2} =\pi \frac{c^{2} }{\pi^{2} }= \frac{c^{2} }{\pi }~~~~(4)[/tex]
c=18,84, so we have
[tex]A=\frac{18.84^{2} }{\pi }=\frac{354.9456}{3.141582}\approx 28.26[/tex]
