Question

4. The bacteria in a culture grows by 2.5% in an hour. If the count of bacteria in the
sample is 120000000, what will be the count of bacteria after 3 hours?​

Answer 1

Step-by-step explanation:

Correct option is

A

131769000

After 1st Hour bacteria increase by 10%

therefore Count of bacteria after 1st hr=121000000+121000000×

100

10

=133100000

After 2nd Hour bacteria decrease by 10%

therefore Count of bacteria after 2nd hr=133100000−133100000×

100

10

=119790000

After 3rd Hour bacteria increase by 10%

therefore Count bacteria after 3rd hr=119790000+119790000×

100

10

=131769000