Question

After how many hours will 300 colonies be present?

Answer 1

B) `1.6h`

Explanation:

Simply put the values into the given equation:
`P = 100xxe^(0.70t)` We want to find "t", given "P"

`300 = 100xxe^(0.70t)` ; `e^(0.70t) = 3`
`ln[e^(0.70t)] = ln3` ; `0.70t = 1.0986`
`t = 1.57h`

With multiple-choice you could also figure it out just by putting the given "t" value into the equation and seeing if you get the desired value of 300 colonies.