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a circular Mirror Has a radius of 5 in find the A circumference and B area of the mirror use exact value of pi round your answer to one decimal place

User Pashute
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1 Answer

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21 votes

A. The circumference will be


\text{circumference}=2\pi r=2\pi(5)=10\pi\approx31.4\text{ in}

B. The area will be


A=\pi r^2=25\pi\approx78.5^{}

squared inches are the units of the point B

User Melad
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