To find the scale factor from circle B to circle C, you divide the radius of circle C by the radius of circle B.
The radius of circle B is 13 feet, and the radius of circle C is 78 feet.
The scale factor is calculated as follows:
\[ \text{Scale Factor} = \frac{\text{Radius of Circle C}}{\text{Radius of Circle B}} = \frac{78}{13} \]
Now, simplify the fraction:
\[ \frac{78}{13} = 6 \]
So the scale factor from circle B to circle C is \( 6 \).
Since the prompt requests to express any non-whole number as a fraction, we will express 6 as a fraction:
\[ 6 = \frac{6}{1} \]
Therefore, the scale factor from circle B to circle C is:
\[ \frac{6}{1} \]