Question

the formula for the circumference of a circle is ( c = 2pi r ), where ( r ) is the radius and ( c ) is the circumference. the equation solved for ( r ) is ( r=\frac{c}{2pi} ). find the radius of a circle that has a circumference of ( 16pi ).
( r = 4 )
( r = 8 )
( r = 12 )
( r = 16 )

Explanation:

Step1: Substitute C=16π into formula

$r = \frac{16\pi}{2\pi}$

Step2: Simplify the expression

$r = \frac{16}{2} = 8$

Answer:

$r=8$