Question

A white blood cell has a diameter of approximately 12 micrometers, or 0.012 um. A model represents its diameter as 24 m. What is the ratio of model size to actual size? A. 200:1 B. 1:200 C. 2,000:1D. 1:2,000

Answer 1

It is given that,

The diameter of a white blood cell is 12 micrometers

The diameter of the white blood cells according to a model is 24 micrometers.

We need to find the ratio of model size to actual size. It can be done as follows :

`R\text{ = }\frac{\text{ model size}}{\text{actual size}}\text{ = }(24)/(12)\text{ = }(2,000)/(1)`

So, the correct answer is C.