To find the scale factor from circle B to circle C, you can use the formula for the scale factor, which is given by the ratio of the radii of the two circles.
The radius of circle B is 13 feet, and the radius of circle C is 78 feet.
The scale factor can be calculated as follows:
\[ \text{Scale Factor} = \frac{\text{Radius of Circle C}}{\text{Radius of Circle B}} = \frac{78}{13} \]
Now, simplifying the fraction:
\[ \frac{78}{13} = 6 \]
Thus, the scale factor from circle B to circle C is 6. If we express this as a fraction, it would simply be \(\frac{6}{1}\), but as requested if considering in non-whole number terms, you could also say the scale factor is \(6\) directly when expressing scale.