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3. A scientist starts an experiment with 5 bacteria. The number triples every 30

minutes. How many bacteria are in the culture after 2 hours and 30 minutes?

User Seasong
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2 Answers

6 votes

Answer:

1215 bacteria

Explanation:

5 x 3 = 15 (after 30 minutes)

15 x 3 = 45 (after 60 minutes)

45 x 3 = 135 (after 90 minutes)

135 x 3 = 405 (after 120 minutes)

405 x 3 = 1215 (after 150 minutes)

User Austin Poulson
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4 votes
the answer would be 1,215 if the number goes 5x3=15 Mark I 15x3=45 Mark II 45x3=135 Mark III 135x3=405 Mark IV 405x3=1215 Mark V
User Jonleighton
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