Question

What is the circumference of a circle with a radius of 2.5 m?

A.
2.5π m

B. 5π m

C.
6.25π m

D.
25 π m

Answer 1

C = (2)(pi)(r)
C = 2*(pi)*2.5
Because you can multiply in any order, you can do 2 * 2.5
C = 5*(pi)
The answer is B

Answer 2

The circumference of a circle is always calculated by 2
`\pi`R
So if R=2.5 m this circumference is 2*
`\pi`*2.5 m
Which is 5
`\pi` m (choice B)

Hope this helped!