Answer:
59 bacteria would there be after 4 hours.
Step-by-step explanation:
Given:
Bacteria in the petri dish = 40
Time taken for the bacteria to be doubled =17 hours
To Find:
To Find the number bacteria left after 4 hours = ?
Solution:
By using the proportionality,
After 17 hours the number of bacteria will be 80.
Let the number of bacteria after 4 hours be x
then
[tex]\frac{80}{17} = \frac{x}{4}[/tex]
Now by cross multiplication
[tex]17 \times x = 80 \times 4[/tex]
[tex]17 x = 320[/tex]
[tex]x=\frac{320}{17}[/tex]
x= 18. 82
So the number of bacteria after 4 hours will be
= 40 + 18.82
= 58.82
=59
