Problema Solution
A certain bacterium triples in number every 30 minutes. Suppose you start with a culture of 50 of these bacteria. How many times do the bacteria triple in number after 2 hours?
Answer provided by our tutors
the start number of bacteria: x
after 30 min: 3x
after another 30 min or total of 2*30 = 60 min: 3*3x
after another 30 min or total of 3*30 = 90 min: 3*3*3x
after another 30 min or total of 4*30 = 120 min = 2 hr: 3*3*3*3x = 3^4x
the bacteria tipples 4 times.