Question

an equation for a circle is given . a. determine its center. b. determine its radius. c. find 2 points on the circle x^2 + (y-8)^2=18

Answer 1

compare with the standard equation of circle and determine

Answer 2

http://answers.yahoo.com/question/index?qid=20080411074756AAPqBAO

Answer 3

a. (0,8)

Answer 4

right?

Answer 5

a. (0,8)
b. 3sqrt2
c. (0,3sqrt2),(3sqrt2,0)

Answer 6

right

Answer 7

for c, I ended up with (3, sq rt 9 + 8) and (3, sq rt 9 -8) . would the sq rt 9 + 8 simplify to sq rt 17? I tried that and ended up with a funky number..