the question is What is the circumference of the circle? the radius is 8 inches (or diameter is 16 inches). choices are a. 8 pi inches; b. 16 pi inches; c. 24 pi inches; or d. 48 pi inches. I say it's 16 pi inches and my boys (incoming 7th grade advanced math students) are saying d. 48 pi inches

Question

the question is What is the circumference of the circle?  the radius is 8 inches (or diameter is 16 inches).  choices are a. 8 pi inches; b. 16 pi inches; c. 24 pi inches; or d. 48 pi inches.  I say it's 16 pi inches and my boys (incoming 7th grade advanced math students) are saying d. 48 pi inches

anonymous · Answer

Circumference = d * pi

Answer = 16pi inches

wolf1728 · Answer

Circumference = diameter * PI
Circumference = 16 * PI

anonymous · Answer

They still don't believe me so I've emailed their math teacher from last year.  Thanks.

anonymous · Answer

Here is the actual question 2.

anonymous · Answer

ok... It's B