The width of a red blood cell is approximately 8 micrometers, which is 8 x 10-6 meter. give your answers to the questions below in scientific notation. be sure to answer both a and b, and explain your answer to b.

a. what would be the width of 7.2 x 105 red blood cells in meters?

b. if a grain of salt is .5mm wide, how many red blood cells could fit across one grain of salt? explain your answer. (hint: 1mm = 1 x 10-3 m.)