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1. anonymous

2. zarkam21

Radius is a straight line from the center to the circumference of a circle or sphere.

3. anonymous

@casdawson could you help?

4. anonymous

i know @zarkam21 lol, look at my link though

5. zarkam21

You need to divide so take the number of square meters and divide by the pie symbol

6. zarkam21

What do you get?

7. anonymous

21.0084

8. zarkam21

9. anonymous

$A=\pi*r^2$$66=\frac{22}{7}*r^2$$\frac{7}{22}*66=r^2$$\frac{462}{22}=r^2$$21=r^2$$\sqrt{21}=r$

10. anonymous

lol 21?? wait, where dose the 22/7 come in at?

11. anonymous

thank you guys!!

12. anonymous

No problem :)

13. anonymous

could you help with this one too?

14. anonymous

15. anonymous

I'm not that good at graphs like that, sorry =(

16. anonymous

aww, its okay thank you anyway

17. anonymous

Second to last answer

18. anonymous

No problem, wish I could help. If you ask it as a separate question someone more qualified will help though.

19. anonymous

good suggestion! @LegendarySadist , on the second problem? @casdawson