## anonymous 5 years ago A circular pool has radius 7.1 meters. You want to build a cement walkway all the way around it and you have enough cement for 33 square meters. How wide can you make your walkway? Give your answer to the nearest centimeter.

1. amistre64

take the circomference of the pool and see what that measures

2. amistre64

or...or...... you have the area of 2 circles to find, one insid ethe other

3. amistre64

Area larger circle - Area smaller circle = 33

4. amistre64

pi(R^2) - pi(r^2) = 33 r = 7.1

5. amistre64

pi(R^2 - (7.1)^2) = 33 solve for R

6. anonymous

I got $\sqrt{61}$

7. amistre64

you got? prove it :)

8. anonymous

lol ok hold on

9. anonymous

YAYY

10. amistre64

yay!! was we right?

11. anonymous

YES! :)

12. anonymous

you are soo much more helpful than my teacher

13. anonymous

i learn more from you than i do form 2 hours of class

14. amistre64

we must be what they wrote about when they defined genius in the dictionary :)

15. anonymous

lol

16. amistre64

I forget more in 2 hours than I ever dreamed of learning :)

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