1. rebeccapink6398

2. anonymous

Well the area of a circle is Pi(r)^2, so just put in the radius where it says r

3. rebeccapink6398

i dont get what your saying like what do i do first.

4. rebeccapink6398

5. anonymous

just plug in the radius to that equation i just gave you. So it will look like $A=\pi(9)^2$

6. rebeccapink6398

ok so( pie times 9) times 2?

7. anonymous

no its pi times 9 squared. 9 squared is 81. So the final equation is $A=81\pi cm^2$

8. anonymous

so the anwer is D

9. rebeccapink6398

i got C A. 1017.36 cm3 B. 169.56 cm3 C. 254.34 cm3 D. 84.78 cm3 @madison.bush

10. anonymous

yes it is C.

11. rebeccapink6398

lol okay thanks!