Answer:
9.8
Explanation:
Since the shaded region has a direct copy of itself on the other side, it means that the shaded region is 1/2 the total area of the circle. The area of the circle is pi(2.5)^2. Which is 6.25pi. 6.25/2 is 3.125. 3.125*3.14159 is 9.8174... Rounded to the nearest tenth, it is 9.8.