Question

if the diameter of a compact disc is 12.5, what is it's circumference​

Answer 1

Answer:

39.25

Step-by-step explanation:

Diameter, d = 12.5

Now, radius

$r = \frac{d}{2} = \frac{12.5}{2} = 6.25$

Circumference can be computed as:

$c = 2\pi \: r \\ c = 2 \times 3.14 \times 6.25 \\ c = 39.25$

Answer 2

Answer:

$diameter \: of \: circle \: is \: = 12.5 \\ \\ now \: radius \\ \\ r = d \: by \: 2 \: = \: 12.5 \: by \: 2 \: = \: 6.25$

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