48.0k views
2 votes
Using the formula c=2r, find the circumference with diameter of 28inches. Round your answer to the nearest inch.

User Dodinas
by
8.4k points

1 Answer

3 votes

Radius is equal to 1/2 the diameter. The radius is 14 (28/2=14)

With your formula:

c=2*14

c=28

HOWEVER I believe you meant

c=2(pi)r

In which

c=2(pi)14

c=28(pi)

In this instance for pi we can use 3.14 since we will be rounding anyway, so

c=28*3.14

c=87.92

Rounded to be

c=88

Note:

If we didn’t round pi out to 3.14 we would have gotten 87.964594...

User Jazzpi
by
8.0k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.