Respuesta :

sophiefoster90

Answer:

1. pi*3^2=9pi <------ you can replace pi with 3.14 or 22/7 by multiplying

2. pi*d/2 ^2= pi*16=16pi

3. The square root of 78.5/pi should be the radius

4. 100pi

5. square root of 3.14/pi

6. 16pi

7. 36pi

8. 81pi

Step-by-step explanation: