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A bacteria culture starts with 200 bacteria and in 1 hour contains 400 bacteria. How many hours does it take to reach 2000 bacteria?
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5 votes
A bacteria culture starts with 200 bacteria and in 1 hour contains 400 bacteria. How many hours does it take to reach 2000 bacteria?

User Par
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1 Answer

5 votes

Answer:

At 0hr it was 200 bacteria

At 1 hr it doubled and was 400

Means: at every 1 hr the population of the bacteria doubles

400 bacteria = 1hr

2000 bacteria = X

X = 2000 × 1 / 400

X = 5 hrs

User Stefan Kamphausen
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