the area of a circle is found with the formula A=(pi)r^2, where pi represents 3.14. If a tile artists is laying down tiles in a circular mosaic pattern and the area of the circle 706.5 square feet, what is the radius of the circle in feet?

A. 11
B. 13
C. 15
D. 17

Question

the area of a circle is found with the formula A=(pi)r^2, where pi represents 3.14. If a tile artists is laying down tiles in a circular mosaic pattern and the area of the circle 706.5 square feet, what is the radius of the circle in feet?

A. 11
B. 13
C. 15
D. 17

wolf1728 · Answer

You have the formula area = pi • r²
Dividing both sides by pi =
r² = area / pi
r = square root (area / pi)
r = square root (706.5 / 3.14)
I think you can solve it from there.

anonymous · Answer

im lost

wolf1728 · Answer

Gee, someone replied.  You can't solve that?

wolf1728 · Answer

Do you know what a square root is?

anonymous · Answer

706.5/ 3.14 is not one of the options

wolf1728 · Answer

Because you have to take the square root of 706.5 / 3.14

anonymous · Answer

oh ;-;

wolf1728 · Answer

As I said before, do you know what a square root is?

anonymous · Answer

Yes I got the answer, it's 15

wolf1728 · Answer

Yep - very good.