Question

can someone check my answer?

Answer 1

What is the arc length of arc CD in the circle below?


i got 6.98

Answer 2

thats correct!
400pi/180 is indeed 6.98 :)

Answer 3

yay! can you help me with more?

Answer 4

sure :)

Answer 5

A circle has its center at (-2, -3) and a radius of 3 units. What is the equation of the circle?

(x + 2)2 + (y - 3)2 = 9

(x - 2)2 + (y - 3)2 = 3 <----- my answer

(x + 2)2 + (y + 3)2 = 9

(x + 2)2 + (y + 3)2 = 3

Answer 6

nopes

Answer 7

\(\Large (x-h)^2+(y-k)^2 =r^2\)

Answer 8

here, h = -2, k = -3
r= 3

Answer 9

idk what you mean?

Answer 10

x-h

h= -2

x-(-2) = .... ?

Answer 11

btw when i say
(x - 2)2 + (y - 3)2 = 3
i mean
(x - 2)^2 + (y - 3)^2 = 3

Answer 12

yeah thats not correct

Answer 13

oh ok

Answer 14

the equation of circle with centre h,k and radius r is
\(\Large (x-h)^2+(y-k)^2 =r^2\)

Answer 15

x-h

h= -2

x-(-2) = .... ?

Answer 16

x + 2?

Answer 17

yes
y-k
k=-3

Answer 18

y + 3

Answer 19

yes
r^2
r=3

Answer 20

so it will d ? (x + 2)^2 + (y + 3)^2 = 3

Answer 21

no

r= 3
so r^2 = 9

Answer 22

oh oops i for got to square it

Answer 23

i got more can you help me with all of them?

Answer 24

sorry, its my dinner time, i will help with others later :)

Answer 25

ok thank you

Answer 26

welcome ^_^

Answer 27

email me on the openstudy email when you are done please

Answer 28

i'm going to close this one and open a different one and see if anyone else can help while your eating

Answer 29

sure , thanks :)