Alarger circle has a circumference of36.a smaller circle has a circumference of one third of that. find the radius of the smaller circle (use 3 for pi)

r=1.91

Step-by-step explanation:

hopefully this helps...

Using the formula

C=2πr

Solving for

r= C/2π = 12/2·π = 1.90986

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

answer: im gonna go with milli

step-by-step explanation: