The radius of the circle is?

Algebra
Tutor: None Selected Time limit: 1 Day

The numerical difference between the area and the circumference of a circle is 3pi. Find the radius of the circle. (Hint:First factor out pi in your equation)

Jun 11th, 2015

Thank you for the opportunity to help you with your question!

assume the radius of the circle is r

then pir^2-2pir=3pi, pi(r^2-2)=pi*3

thus r^2-2=3, r^2=5

thus the radius is sqrt5

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 11th, 2015

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