Question

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?

Answer 1

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)

Answer 2

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