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ExtremeBDS [4]
2 years ago
14

Consider a circle whose size can vary. The circumference of the circle is always 2 π 2π times as large as its radius. Let r r re

present the radius of the circle (in feet) and let C C represent the circumference of the circle (in feet). Write a formula that expresses C C in terms of r r. Preview
Mathematics
1 answer:
Alenkasestr [34]2 years ago
4 0

Answer: C=2\pi r

Step-by-step explanation:

Let be "C" the circumference of the circle (in feet) and "r" the radius of the circle (in feet).

Based on the information provided in the problem, you know that the circumference of the circle is always 2\pi as large as its radius.

Notice that this indicates a multiplication. Then, this means that the circumference of the circle is always equal to 2\pi by "r".

Based on this, you can write the following formula that expresses the circumference "C" in terms of the radius "r":

C=2\pi r

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1.994

Step-by-step explanation:

"Percent" means "per 100" or "over 100". To convert 199.4% to a decimal rewrite 199.4 percent in terms of per 100 or over 100.

199.4% = 199.4 over 100 or,

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199.4 over 100 is the same as 199.4 divided by 100. Completing the division we get:

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Simplified Conversion:

Remove the percent sign % and divide by 100.

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Shortcut Conversion:

Move the decimal point 2 places to the left and remove the percent sign %

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