Rewrite the equation
c
=
2
πr
to show the expression that can be used to fine the value of r.

r=C/2π

Step-by-step explanation:

here we just have to rearrange the given formulae in such a way that it finds out the value of r.

Given formulae is C=2πr

we can carry 2π to the left hand side.

r= . is the recquired formulae.

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870

what am i trying to find out. you didn't put up the whole question.

step-by-step explanation: