15 cookies burned because if you Turn

into a decimal then multiply it by 20 you get 15 and thats your answer.
Answer:

Step-by-step explanation:
If the population increases at a rate of 4% per annum, then:
In year 1:

Where
is the initial population and
is the population in year n
In year 2

It can also be written as:

Taking out common factor

Taking out common factor (1 + 0.04)

Taking out again common factor 
Simplifying

So

This is the equation that represents the population for year n
Then, in 4 years, the population will be:

2 2/5=12:5
5 1/5= 26:5
12:26:5
I think.
I just did this a few seconds ago and the correct answer is 78. The check above the number is green which means its correct.
Answer: 10m+2
Explanation: perimeter = all the sides added together. Then simplify it. :)