Question

a worker at a medical lab is studying blood samples. two samples contained a total of 95,142 blood cells. the first sample contained 9,343 blood cells. how many blood cells were in the second sample?

Explanation:

Step1: Identify the operation

We know the total number of blood cells in two samples and the number in the first sample. To find the number in the second sample, we use subtraction. Let \( T \) be the total, \( F \) be the first sample, and \( S \) be the second sample. The formula is \( S = T - F \).

Step2: Substitute the values

Given \( T = 95142 \) and \( F = 9343 \), we calculate \( S = 95142 - 9343 \).
\[

$$\begin{align*} 95142 - 9343&=(95000 + 142)-(9000 + 343)\\ &=(95000 - 9000)+(142 - 343)\\ &= 86000+(142 - 343)\\ &= 86000 - 201\\ &= 85799 \end{align*}$$

\]

Answer:

The second sample contains 85799 blood cells.