anonymous
  • anonymous
the area of a circle is found by the equation a=pi r ^2 . if the area a of a certain circle is 16 pi square inches, find its radius r a. 8 pi inch b. 4 inch c. 32 inch d. 8 inch
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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myininaya
  • myininaya
a=pi*r^2 16=pi*r^2 16/pi=r^2 (16/pi)^(1/2)=r 4/(pi)^(1/2)=r
myininaya
  • myininaya
oh the area is 16pi
myininaya
  • myininaya
ok so we have 16pi=pi*r^2

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myininaya
  • myininaya
divide both sides by pi so we have 16=r^2 what is the square root of 16?
myininaya
  • myininaya
that will be your radius once you answer that question
anonymous
  • anonymous
4
anonymous
  • anonymous
thanks

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