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A circle is increased to have a circumference that is 4 times larger than the original. Which of the following options best describes the change in the radius of the original circle?increased by a factor of 8increased by a factor of 4increased by a factor of 16increased by a factor of 12

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carlosego
The original circumference is:
 C1 = 2 * pi * r1
 The new circumference is:
 C2 = (2 * pi * r2)
 "circumference that is 4 times larger than the original"
 (2 * pi * r2) = 4 (2 * pi * r1)
 Rewriting:
 r2 = 4r1
 Answer:
 The radius of the original circle is:
 increased by a factor of 4

Answer:

increased by a factor of 4

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