Question

A doctor takes a sample of Laura’s blood. There are 4.5*10^6 red blood cellsand 5000 white blood cells. How many times more red blood cells are there than white in the sample? (Answer in scientific notations)

Answer 1

Red blood cells are 900 times of white blood cells in the blood sample of Laura.

Explanation:

Sample of Laura's blood sample contains number of red plus cells = 4.5
`10^(6)` and number of white blood cells = 5×
`10^(3)`

Now we calculate the ratio of red blood cells and white blood cells

= 4.5×
`10^(6)`÷5
`10^(3)`

= 4.5×
`10^(3)`÷5

= 4500÷5

=900

Now scientific representation of data will be

Test Result Range

White Blood Cells 5×
`10^(3)`per
`mm^(3)` 5-10

Red Blood Cells 4.5×
`10^(3)` per
`mm^(3)` 4.2-6.11

Answer 2

Number of red blood cells =
`4.5*10^(6)`

Number of white blood cells = 5000 or we can write this as
`5*10^(3)`

We have to find how many times more red blood cells are there than white in the sample. so we will divide the two to get the answer.

`(4.5*10^(6))/(5*10^(3))`

=
`0.9*10^(3)`

=
`9*10^(2)` = 9*10*10 = 900

Hence, the red blood cells are 900 times more than white blood cells.