Question

question 8 of 10
a cd is shaped like a circle with a diameter of 12 cm. to the nearest centimeter, what is the circumference of the cd?
a. 24 cm
b. 75 cm
c. 19 cm
d. 38 cm

Explanation:

Step1: Recall the formula for circumference

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

Step2: Substitute the given diameter

Given $d = 12$ cm, so $C=\pi\times12$. Taking $\pi\approx 3.14$, then $C\approx3.14\times 12 = 37.68$ cm.

Step3: Round to the nearest centimeter

Rounding $37.68$ cm to the nearest centimeter gives $38$ cm.

Answer:

D. 38 cm