32.
A bacterial culture contained 32x10^6 cells after 2.5 hours of exponential growth. If the doubling time was 30 min, what was the initial population number in this culture ?
A:
20x10^4 cells
B:
10x10^5 cells
C:
40x10^5 cells
D:
16x10^6 cells
The answer is:
B