Question

The circumference of a circle is 15. Use the formula 646-03-07-00-00_files/i0260000.jpg to find the radius, r. Use 3.14 as an approximation for and round your answer to the nearest hundredth. a. r = 5.21 c. r = 4.78 b. r = 2.39 d. r = 3.17

Answer 1

Hello!

The equation to find the radius when you know the circumference is


`r= (C)/(2 \pi )`

r is radius
C is circumference

Put in the values you know and 3.14 for pi


`r= (15)/(2 * 3.14)`

Multiply


`r = (15)/(6.28)`

Divide

r = 2.39

The answer is r = 2.39

Hope this helps!