Question

a circle has a diameter of 30 mm. 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 (diameter)

The formula for the circumference of a circle using diameter is $C = \pi d$, where $d$ is the diameter.

Step2: Substitute given values

Substitute $\pi = 3.14$ and $d = 30$ mm into the formula:
$C = 3.14 \times 30$

Step3: Calculate the product

$C = 94.2$

Answer:

94.2 mm