A circle has a circumference of 84.78 in. What is the radius of the circle?

1 Answer
Jim G.
Dec 1, 2017

#13.493" to 3 dec. places"#

Explanation:

#"using the formula for the circumference of a circle"#

#• " circumference "=2pirlarrcolor(blue)"r is the radius"#

#rArr2pir=84.78#

#"divide both sides by "2pi#

#(cancel(2pi) r)/cancel(2pi)=84.78/(2pi)#

#rArrr~~13.493" to 3 decimal places"#

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