Question

An average person has 6x10^2 times as many red bloods cells as white blood cells. A small sample of blood has 7x10^3 white blood cells. About how many red blood cells are in the sample?

Answer 1

The sample has 4200 × 10³ cells red blood cells

Step-by-step explanation:

Assume that the number of white blood cells in an average person is w

We are given that:

Number of red blood cells is 6 × 10² times as many as white blood cells

This means that, in average person:

Number of red blood cells = 6 × 10² × number of white blood cells

Number of red blood cells = 6 × 10² × w ................>

We are given that:

A sample of blood has 7 × 10³ white blood cells

To know the number of red blood cells in the sample, we will simply substitute with w = 7 × 10³ in equation I

This is done as follows:

Number of red blood cells = 6 × 10² × w

Number of red blood cells = 6 × 10² × 7 × 10³

Number of red blood cells = 4200 × 10³ cells

Hope this helps :)