Question

1. the graphite in a pencil has a diameter of 1.5 millimeters and is surrounded by wood that is 2 millimeters thick. what is the distance around the pencil? use 3.14 for π. round to the nearest millimeter.

5 mm
24 mm
17 mm
11 mm

Explanation:

Step1: Calculate outer - diameter

The diameter of the graphite is 1.5 mm and the wood is 2 mm thick on each side. So the outer - diameter $d$ of the pencil is $d=1.5 + 2+2=5.5$ mm.

Step2: Calculate the circumference

The formula for the circumference of a circle is $C = \pi d$. Using $\pi = 3.14$ and $d = 5.5$ mm, we have $C=3.14\times5.5 = 17.27$ mm.

Step3: Round the result

Rounding 17.27 mm to the nearest millimeter gives 17 mm.

Answer:

17 mm