If a cubic millimeter of blood contains 5.2*10^6 red blood cells, how many red blood cells are contained in 40 cubic milliliters of blood?
First, we need to convert the volume from cubic millimeters to cubic milliliters:
1 cubic millimeter = 0.001 cubic milliliters
So, 40 cubic millimeters = 40 x 0.001 = 0.04 cubic milliliters.
Now, we can use the given information to find the number of red blood cells in 0.04 cubic milliliters of blood:
5.2*10^6 red blood cells are contained in 1 cubic millimeter of blood
Therefore, the number of red blood cells in 0.04 cubic milliliters of blood is:
5.2*10^6 x 0.04 = 208,000 red blood cells.
Therefore, there are 208,000 red blood cells in 40 cubic milliliters of blood.