According to the Guinness Book of World Records, the largest coin has a radius of 40 centimeters.
What is the circumference of the coin?
251.2 cm
62.8 cm
125.6 cm
502.4 cm

251. cm

Step-by-step explanation:

2 × pi = 6.28

6.28 × 40 = 251.2

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

x

step-by-step explanation: