Help Please?!?!
What is the exact circumference of the circle?
http://lv.k12.com/mediaFiles/Ninth_Grade/Math/Unit17525/Lesson68692/VHS_PA_S2_03_L209_L309_Q1.gif
A.10π feet
B.20π feet
C.40π feet
D.60π feet

Question

Help Please?!?!
What is the exact circumference of the circle?
http://lv.k12.com/mediaFiles/Ninth_Grade/Math/Unit17525/Lesson68692/VHS_PA_S2_03_L209_L309_Q1.gif
 A.10π feet
 B.20π feet
 C.40π feet
 D.60π feet

hartnn · Answer

that 20 feet is radius or diameter ?

anonymous · Answer

Diameter I believe

hartnn · Answer

Ciecumference $C = 2\pi r = \pi d $
where r= radius, d= diameter.

anonymous · Answer

what?

hartnn · Answer

Circumference is just diameter multiplied by pi (π)

anonymous · Answer

witch came out as 62.8...

terenzreignz · Answer

Leave out the pi as a factor, the choices seem to call for it.

hartnn · Answer

you'll need the answer in π , so keep it as it is

anonymous · Answer

???.. so it would be  
D. 60π feet

hartnn · Answer

diameter = 20 , 
Circumference = Diameter * π=20π 
got this ?

anonymous · Answer

sure...
:/

hartnn · Answer

any more doubts ?