According to the graph, which must be true?
When the circumference is approximately 4 cm, the radius is 25.12 cm.
When the radius is 5 cm, the circumference is approximately 28.26 cm.
When the circumference is approximately 5 cm, the radius is 28.26 cm.
When the radius is 4 cm, the circumference is approximately 25.12 cm.

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

0.32

step-by-step explanation:

2.24/7

sounds & other waves originate from any vibrating object

step-by-step explanation:

why? because i noticed a pattern. 60 120. those numbers without the zero, make the 6 times tables leaving your answer to be b since 6 times 4 is 24 and adding a zero making it 240.