Adult humans have approximately 2.6 red blood cells and 3.92 white blood cells. about how many times greater is the number of red blood cells than white blood cells? a. 660 b. 1,300 c. 1,500 d. 6,600

The number of red blood cells is approximately 660 times greater than white blood cells (option A).

Explanation:

In adult humans the blood has about 4,5 to 6 million red blood cells per cubic millimeter (mm3), while the normal value of white blood cells is between 5,000 and 10,000 per mm3.

In this exercise, the given values are

To know how many times there are more red blood cells than white blood cells in this sample, only have to divide the amount of the former between the second:

2.600.000 / 3.920 = 663,27 ≈ 660

For given cell values, the number of red blood cells is about 600 times greater than white blood cells.

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