Question

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 as great is the diameter of a red blood cell as the diameter of an influenza virus? 2 5 6 8

Explanation:

Step1: Set up the ratio

Let $d_{r}$ be the diameter of the red - blood cell and $d_{v}$ be the diameter of the virus. We want to find $\frac{d_{r}}{d_{v}}$, where $d_{r}=0.000008$ and $d_{v}=0.0000013$.

Step2: Calculate the ratio

$\frac{d_{r}}{d_{v}}=\frac{0.000008}{0.0000013}=\frac{8\times10^{- 6}}{1.3\times10^{-6}}=\frac{8}{1.3}\approx6.15$

Answer:

C. 6