Question

the radius of a circle is 4 kilometers. what is the circles circumference? round your answer to the nearest hundredth.

Explanation:

Step1: Recall the formula

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

Step2: Substitute the radius value

Given $r = 4$ km, substitute into the formula: $C=2\pi\times4 = 8\pi$ km.

Step3: Calculate the value

Using $\pi\approx3.14159$, $C\approx8\times3.14159 = 25.13272$ km.

Step4: Round the result

Rounding to the nearest hundredth, $C\approx25.13$ km.

Answer:

$25.13$ km