An influenza virus molecule has a diameter of about 0.0000013 m, and a red blood cell has a diameter of about 0.000008 m. Approximately how many times greater is the diameter of a red blood cell than the diameter of an influenza virus?

Question

anonymous · Answer

The equation$$y=kx$$
can be read as "$y$ is $k$ times bigger than $x$". If you let $y=0.000008$ and $x=0.0000013$, you can solve for $k$:
$$0.000008=0.0000013k~~\iff~~k=6.15385$$