4 years ago

Please help me find these answers...

1 answer:

8 0

(a)
The formula for circumference is
$2\pi \: r$ your radius is 4mm so
$2 \times \pi \times 4mm$
which equals to
$8\pi \: mm$
(b) type
$8\pi$
in your calculator and round it off to the nearest hundred
this should be the answer: 25.133 mm

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