Posted by Anonymous on Monday, September 30, 2013 at 9:28pm.
If a circle's circumference is 15 inches, what is its radius?

Algebra 1 I do not understand  Ms. Sue, Monday, September 30, 2013 at 9:35pm
C = pi * d
15 = 3.14 * d
15/3.14 = d
4.77707 = d
4.77707 / 2 = r
2.388535 = r

Algebra 1 I do not understand  Anonymous, Monday, September 30, 2013 at 9:44pm
I still don't understand this.

Algebra 1 I do not understand  Anonymous, Monday, September 30, 2013 at 9:44pm
Can you explain the steps in solving this formula?

Algebra 1 I do not understand  Ms. Sue, Monday, September 30, 2013 at 9:51pm
Please copy and paste the line you don't understand.

Algebra 1 I do not understand  Anonymous, Monday, September 30, 2013 at 9:52pm
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.

Algebra 1 I do not understand  Ms. Sue, Monday, September 30, 2013 at 9:54pm
Circumference = pi * diameter
Then I substituted real numbers for the letters.

Algebra 1 I do not understand  Anonymous, Monday, September 30, 2013 at 9:55pm
How did you know which numbers to use?

Algebra 1 I do not understand  Ms. Sue, Monday, September 30, 2013 at 9:57pm
Please memorize pi = 3.154
Your problem stated that the circumference is 15.
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