A typical healthy blood cell has a diameter of about 0.000008 meters. A red blood cell with a diameter higher than this signals an illness. Which red blood cell is larger than the average size of a healthy blood cell?
A. 8x10^-9
B. 8x10^-6
C. 8x10^-7
D. 8x10^-5
The correct answer is A. 8x10^-9.
Since a typical healthy blood cell has a diameter of 0.000008 meters, we can convert this to scientific notation as 8x10^-6.
Among the options given, only option A, 8x10^-9, is smaller than the average size of a healthy blood cell. The other options, including options B (8x10^-6), C (8x10^-7), and D (8x10^-5), are larger than the average size of a healthy blood cell.