A culture of 200 bacteria doubles every 2 hours. How many bacteria are there after 10 hours?
Answer and explanation
Correct answer: B. 6400
- Step 1: The number of doublings is 10 / 2 = 5.
- Step 2: N = 200 x 2^5 = 6400.
Answer
6400.
Why not the others: '2000' multiplies by 2n instead of 2^n; '3200' applies one doubling too few; '1200' adds P0 repeatedly, which is linear growth.
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