Question

The number of bacteria in a culture grew from 275 to 1135 in three hours. How do you find the number of bacteria after 7 hours?

Answer 1

The increase in number of bacteria in the culture in 3 hours = 860

The increase in number of bacteria in one hour = 860/3

Thus, the number of bacteria after 7 hours = (860/3) × 7 = 6020/3

Hence, we can say that number of bacteria in 7 hours was approximately (2006+275) = 2281