Question

a circle has a radius of 13 yd. what is its circumference? use 3.14 for π, and do not round your answer. be sure to include the correct unit in your answer.

Explanation:

Step1: Recall circumference formula

The formula for the circumference of a circle is $C = 2\pi r$, where $r$ is the radius and $\pi\approx3.14$.

Step2: Substitute given radius

Given $r = 13$ yd and $\pi=3.14$, we substitute into the formula: $C=2\times3.14\times13$.

Step3: Perform multiplication

$2\times3.14\times13 = 6.28\times13=81.64$ yd.

Answer:

$81.64$ yd