DANGIMLOST wrote:IF A RED BLOOD CELL IS 6X10^-6METERS HOW MANY RED BLOOD CELLS ARE NEEDED TO MAKE A LINE ONE INCH LONG
First, number systems should be the same, in this case either metric or U.S. measurement units. Use metric as it's easier.
As diameters of the red blood cells in this problem are in meters, you need to convert 1 inch to meters. 1 inch = 0.0254 meters
Now re-word the question: How many times will 6.00E-6 m go into 0.0254 m?
0.0254 m / 0.000006 m = X (number of red blood cells in 1 inch)