Percentage

The correct answer is listed below:

The number of bacteria after 24 hours
= 12600 * (1+20%)^24
= 12600 * 79.4968472
= 1001660 ( 7 sig.fig)

The explanations are listed below:

Bacteria grows at a rate of 20% per hour so their number increases by 20%.
Then you need to multiply the original number of bacteria by 1.2 in order to find the number of bacteria 1 year later.
As the question ask you the number of bacteria after 24 years, you need to keep multiply it by 1.2 until you have multiplied it for 24 times.

The number of bacteria in a bottle of sour milk grows at a rate of 20% per hour. If there are 12600 bacteria in a bollte of milk now, how many bacteria are there after 24 hours?

12600x(1+20%)^24
=1001660(corr. the answer to 7 sig.fig.)

答案在7位數字後成小數

解說:
12600=24小時前細菌
(1+20%)=每小時增1.2倍
^24=24小時"菌搭菌",同利搭利一樣計法