Find the radius and circumference of a CD with a diameter of 4.75 inches. SOMEONE PLEASE HELP ME!!!!!

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02-02-2017
Mathematics

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Find the radius and circumference of a CD with a diameter of 4.75 inches. SOMEONE PLEASE HELP ME!!!!!

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sao8beedo sao8beedo · Answer 1 · 2017-02-02T05:25:14+01:00

sao8beedo sao8beedo

02-02-2017

The radius is half of the diameter.
To find the circumference, use the equation C=2(pi)r or C=(pi)d.
r meaning radius. d meaning diameter.
(pi) is about 3.14 or 22/7

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beautyboss86 beautyboss86 · Answer 2 · 2017-02-02T05:27:09+01:00

beautyboss86 beautyboss86

02-02-2017

Here are your equations:
r = diameter/2
C = 2*pi*r

Now all you have to do is plug in the 4.75 for the diameter, and you have your answer!
If you don't have a calculator with "pi" on it, use 3.14159.

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