Question

a circle has a diameter of 30 cm. 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 $C = \pi d$, where $C$ is the circumference and $d$ is the diameter.

Step2: Substitute the values

Given $d = 30$ cm and $\pi=3.14$, we substitute into the formula: $C=3.14\times30$.

Step3: Calculate the result

$C = 94.2$ cm.

Answer:

94.2 cm