Respuesta :
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
Answer:
1215 bacteria
Step-by-step 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)