Use the Following to Answer Questions

Multiple Choice

Use the following to answer questions :
A lab technician wishes to grow a culture of 800,000 bacteria, which are known to double in 16 hours. The technician begins with 9000 bacteria.
-How many hours will it take for the culture to produce the 100,000 bacteria? Round your answer to the nearest hour.

A) 64 hours
B) 66 hours
C) 69 hours
D) 72 hours