The diagram displays an image of a cell with a scale bar. The scale bar ($Z$) shows an actual length of $15\,\mu\text{m}$. Distance $Y$ shows the diameter of the cell image. Which calculation is correct for finding the cell’s actual diameter?
- A$15 \times (Y + Z)$
- B$Y \times \left(\frac{Z}{15}\right)$
- C$\left(\frac{Y}{Z}\right) \times 15$
- D$\left(\frac{Y}{15}\right)$