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RebelChi
 3 years ago
The circumference of a circle is 15ft. What is the length of the radius? Use 3.14 for pi. Round your answer to the nearest tenth of a foot?
RebelChi
 3 years ago
The circumference of a circle is 15ft. What is the length of the radius? Use 3.14 for pi. Round your answer to the nearest tenth of a foot?

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mohd.jas
 3 years ago
Best ResponseYou've already chosen the best response.2The equation for circumference is 2*pi*r. You have pi and the circumference (= 15ft). So the equation becomes: 15 = 2*pi*r. Now solve for r.

mohd.jas
 3 years ago
Best ResponseYou've already chosen the best response.2Okay, we'll do this stepbystep. The equation for the circumference of a circle is given by C = 2*pi*r, where C is the circumference (given as 15ft), pi is, well, pi (given as 3.14 in the question), and r is the radius of the circle. Our goal is to find the radius. First we substitute everything we know into the equation for the circumference, so it becomes: 15 = 2*3.14*r Are you following so far? Now, we divide both sides of the equation by 2*3.14, so that the rightside of the equation becomes only 'r'  like so: 15/(3.14*2) = (2*3.14*r)/(2*3.14) 15/(3.14*2) = r Now simply divide 15 by the product of the (3.14*2) to get the required radius in feet. :)

mohd.jas
 3 years ago
Best ResponseYou've already chosen the best response.2No, the other way! 15/6.28
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