Question

to the nearest hundredth, what is the circumference of a circle with a radius of 5 units?
a. 31.42 units
b. 15.70 units
c. 78.54 units
d. 27.63 units

Explanation:

Step1: Recall the formula for circumference.

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

Step2: Substitute the given radius.

Given $r = 5$ units, so $C=2\times\pi\times5 = 10\pi$ units.

Step3: Calculate the value and round.

$10\pi\approx10\times 3.14159 = 31.4159$. Rounding to the nearest hundredth gives $31.42$ units.

Answer:

A. 31.42 units