Question

The cells of a bacteria doubles in every 15 minutes. A scientist begins with a single cell. How many cells will be there after (a).4 hours (b)10 hours ? Express your answers in exponential form. pls help me

Answer 1

Explanation:

Given that:-

• 1 cell = 15 minutes

So, we can concert 15 minutes to hours.

So,

60 minutes = 1 hour

1 minute = 1/60

15 minutes =

`(15)/(60) = 0.25 \: hrs`

Okay, now we will apply first for 0.4 hours.

`0.25 \: hrs= 1 \: cell`

`1 \: hr = (1)/(0.25)`

`0.4 \: hrs = (0.4)/(0.25)`

`= 1.6 \: cells`

`= 16 * {10}^( - 1) \: cells`

Now, second one:-

`10 \: hrs = (10)/(0.25)`

`= 40 \: cells`

`= 0.4 * {10}^(2) \: cells`

Hope it helps :D