a culture of 15 bacteria in a pictre dish doubles every hour.how many bacteria will there be after 4hours
Answer (1)
Answer:Initial number of bacteria = 15After 1 hour = 15 × 2 = 30After 2 hours = 30 × 2 = 60After 3 hours = 60 × 2 = 120After 4 hours = 120 × 2 = 240Alternatively, you can use the formula:N(t) = N0 × 2^twhere:N(t) = number of bacteria after t hoursN0 = initial number of bacteria (15)t = time in hours (4)N(4) = 15 × 2⁴= 15 × 16= 240
