B. 31.4 (pi) units
C. 31.4 units
A. 10 (pi)
Explanation:
Well since the equation to find circumference is C = 2(pi)r
And 10(pi) is exactly 2(pi)r, it’s not the answer.
And if we use 3.14 as an estimate for (pi), then 31.4 is also true for the circumference, because 10•3.14=31.4.
Also 10(pi) is more acurate then 31.4 because (pi) isnt exactly 3.14 its more like 3.1415926535...
Hope this Helps!
