neeeeed heeelp?

Question

If 1500 white blood cells are lined up side to side they would form a row 1.0 inch long. What is the average diameter in micrometers of a single white blood cell? (1 inch = 2.54 cm)

Answer 1

If 1500 form 2.54 cm, then 1 must take 2.54/1500 = 0.0016933... cm.
But we want micrometers, which is 10^-6. cm is 10^-2, so we have to multiply by 10^4 to get 169.33 micrometers.

If you had used a less-rounded version of 1 inch, you will get a more accurate result.

Answer 2

1 inch= 2.54 cm = 254000micrometer
no. of WBC = 1500
Av diameter= 254000/1500 micrometer
=169.33333333
=1.69*10^2 micrometer
[Note I have rounded it off to the lowest no. of significant figures in the data, a rule in science]

Answer 3

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