If a circle's circumference is 15 inches, what is its radius?

Answer 1

C = pi * d

15 = 3.14 * d

15/3.14 = d

4.77707 = d

4.77707 / 2 = r

2.388535 = r

Answer 2

I still don't understand this.

Answer 3

Can you explain the steps in solving this formula?

Answer 4

Please copy and paste the line you don't understand.

Answer 5

C = pi * d

15 = 3.14 * d

15/3.14 = d

4.77707 = d

4.77707 / 2 = r

I apologize, but I do not understand any of them.

Answer 6

Circumference = pi * diameter

Then I substituted real numbers for the letters.

Answer 7

How did you know which numbers to use?

Answer 8

Please memorize pi = 3.154

Your problem stated that the circumference is 15.

Answer 9

thats wrong. pi equals to 3.14 not 3.154 and im in 7th grade and i know this hahah