Answer:
Area of shaded region = 351.68 cm²
Step-by-step explanation:
Area of a circle = πr²
where r = radius = 3.14
Area of bigger circle = 3.14 × 11²
= 3.14 × 11 × 11
= 379.94cm²
Area of smaller circle = 3.14 * 3²
= 3.14 × 3 × 3
= 28.26cm²
Area of shaded region = Area of bigger circle - Area of smaller circle
= (379.94 - 28.26) cm²
= 351.68 cm²

For each boy, there are 5 girls
Answer:
See picture
Step-by-step explanation:
The rule is ...
![x^{m/n}=\sqrt[n]{x^m}](https://tex.z-dn.net/?f=x%5E%7Bm%2Fn%7D%3D%5Csqrt%5Bn%5D%7Bx%5Em%7D)
The index of the surd becomes the denominator of the exponents inside.