A population culture begins with 15 strands of bacteria and then doubles every 4 hours. This can be modeled as 15 (2) t/4, where t is time in hours. How many strands of bacteria are present at 12 hours?
Answer is:
A. 200 strands of bacteria
B. 400 strands of bacteria
C. 252 strands of bacteria
D. 120 strands of bacteria
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